error when i'm trying to go to administrative section

Hello

First I want to say, that my site worked fine. I nothing changed. And someday, when I try to go to admiistrative section I have that errors:

Warning: MySQL server has gone away query: INSERT INTO drupal_watchdog (uid, type, message, variables, severity, link, location, referer, hostname, timestamp) VALUES (1, 'php', '%message in %file on line %line.', 'a:4:{s:6:\"%error\";s:12:\"user warning\";s:8:\"%message\";s:79656:\"MySQL server has gone away\nquery: UPDATE drupal_cache_update SET data = 'a:9:{s:7:\\"adsense\\";a:10:{s:5:\\"title\\";s:7:\\"AdSense\\";s:10:\\"short_name\\";s:7:\\"adsense\\";s:10:\\"dc:creator\\";s:6:\\"kbahey\\";s:11:\\"api_version\\";s:3:\\"6.x\\";s:17:\\"recommended_major\\";s:1:\\"1\\";s:16:\\"supported_majors\\";s:1:\\"1\\";s:13:\\"default_major\\";s:1:\\"1\\";s:14:\\"project_sta in /home/pawi/domains/serwisowo.info/public_html/includes/database.mysql.inc on line 128

* user warning: MySQL server has gone away query: SELECT s.lid, t.translation, s.version FROM drupal_locales_source s LEFT JOIN drupal_locales_target t ON s.lid = t.lid AND t.language = 'pl' WHERE s.source = 'A forum topic is the initial post to a new discussion thread within a forum.' AND s.textgroup = 'default' in /home/pawi/domains/serwisowo.info/public_html/modules/locale/locale.module on line 376.
* user warning: MySQL server has gone away query: INSERT INTO drupal_locales_source (location, source, textgroup, version) VALUES ('/admin', 'A forum topic is the initial post to a new discussion thread within a forum.', 'default', '6.9') in /home/pawi/domains/serwisowo.info/public_html/modules/locale/locale.module on line 392.
* user warning: MySQL server has gone away query: DELETE FROM drupal_cache WHERE cid LIKE 'locale:%' in /home/pawi/domains/serwisowo.info/public_html/includes/cache.inc on line 175.
* user warning: MySQL server has gone away query: SELECT nt.type, nt.* FROM drupal_node_type nt ORDER BY nt.type ASC in /home/pawi/domains/serwisowo.info/public_html/modules/node/node.module on line 552.
* user warning: MySQL server has gone away query: SELECT * FROM drupal_system WHERE type = 'theme' in /home/pawi/domains/serwisowo.info/public_html/includes/theme.inc on line 449.
* user warning: MySQL server has gone away query: SELECT info FROM drupal_system WHERE type = 'theme' AND name = 'giordani' in /home/pawi/domains/serwisowo.info/public_html/modules/system/system.module on line 965.
* warning: array_map() [function.array-map]: Argument #2 should be an array in /home/pawi/domains/serwisowo.info/public_html/modules/system/system.module on line 966.
* warning: array_keys() [function.array-keys]: The first argument should be an array in /home/pawi/domains/serwisowo.info/public_html/includes/theme.inc on line 1760.
* warning: Invalid argument supplied for foreach() in /home/pawi/domains/serwisowo.info/public_html/includes/theme.inc on line 1760.
* user warning: MySQL server has gone away query: SELECT data, created, headers, expire, serialized FROM drupal_cache_menu WHERE cid = 'links:navigation:page-cid:admin:1' in /home/pawi/domains/serwisowo.info/public_html/includes/cache.inc on line 26.
* user warning: MySQL server has gone away query: SELECT p1, p2, p3, p4, p5, p6, p7, p8 FROM drupal_menu_links WHERE menu_name = 'navigation' AND link_path IN ('admin') in /home/pawi/domains/serwisowo.info/public_html/includes/menu.inc on line 890.
* user warning: MySQL server has gone away query: SELECT p1, p2, p3, p4, p5, p6, p7, p8 FROM drupal_menu_links WHERE menu_name = 'navigation' AND link_path = 'admin' in /home/pawi/domains/serwisowo.info/public_html/includes/menu.inc on line 895.
* user warning: MySQL server has gone away query: SELECT m.load_functions, m.to_arg_functions, m.access_callback, m.access_arguments, m.page_callback, m.page_arguments, m.title, m.title_callback, m.title_arguments, m.type, m.description, ml.* FROM drupal_menu_links ml LEFT JOIN drupal_menu_router m ON m.path = ml.router_path WHERE ml.menu_name = 'navigation' AND ml.plid IN (0) ORDER BY p1 ASC, p2 ASC, p3 ASC, p4 ASC, p5 ASC, p6 ASC, p7 ASC, p8 ASC, p9 ASC in /home/pawi/domains/serwisowo.info/public_html/includes/menu.inc on line 933.
* user warning: MySQL server has gone away query: SELECT data, created, headers, expire, serialized FROM drupal_cache_menu WHERE cid = 'links:navigation:tree-data:5d6d3aaaaef5fba302ce62698fa37bbe' in /home/pawi/domains/serwisowo.info/public_html/includes/cache.inc on line 26.
* user warning: MySQL server has gone away query: UPDATE drupal_cache_menu SET data = 'a:2:{s:4:\"tree\";a:0:{}s:10:\"node_links\";a:0:{}}', created = 1239959258, expire = 0, headers = '', serialized = 1 WHERE cid = 'links:navigation:tree-data:5d6d3aaaaef5fba302ce62698fa37bbe' in /home/pawi/domains/serwisowo.info/public_html/includes/cache.inc on line 109.
* user warning: MySQL server has gone away query: UPDATE drupal_cache_menu SET data = 'links:navigation:tree-data:5d6d3aaaaef5fba302ce62698fa37bbe', created = 1239959258, expire = 0, headers = '', serialized = 0 WHERE cid = 'links:navigation:page-cid:admin:1' in /home/pawi/domains/serwisowo.info/public_html/includes/cache.inc on line 109.
* user warning: MySQL server has gone away query: SELECT dst FROM drupal_url_alias WHERE src = 'admin' AND language IN('pl', '') ORDER BY language DESC in /home/pawi/domains/serwisowo.info/public_html/includes/path.inc on line 69.
* user warning: MySQL server has gone away query: SELECT * FROM drupal_menu_router WHERE tab_root = 'admin' ORDER BY weight, title in /home/pawi/domains/serwisowo.info/public_html/includes/menu.inc on line 1306.
* user warning: MySQL server has gone away query: SELECT s.lid, t.translation, s.version FROM drupal_locales_source s LEFT JOIN drupal_locales_target t ON s.lid = t.lid AND t.language = 'pl' WHERE s.source = 'Welcome to the administration section. Here you may control how your site functions.' AND s.textgroup = 'default' in /home/pawi/domains/serwisowo.info/public_html/modules/locale/locale.module on line 376.
* user warning: MySQL server has gone away query: INSERT INTO drupal_locales_source (location, source, textgroup, version) VALUES ('/admin', 'Welcome to the administration section. Here you may control how your site functions.', 'default', '6.9') in /home/pawi/domains/serwisowo.info/public_html/modules/locale/locale.module on line 392.
* user warning: MySQL server has gone away query: DELETE FROM drupal_cache WHERE cid LIKE 'locale:%' in /home/pawi/domains/serwisowo.info/public_html/includes/cache.inc on line 175.
* user warning: MySQL server has gone away query: SELECT data, created, headers, expire, serialized FROM drupal_cache_update WHERE cid = 'update_info' in /home/pawi/domains/serwisowo.info/public_html/includes/cache.inc on line 26.
* user warning: MySQL server has gone away query: SELECT dst FROM drupal_url_alias WHERE src = 'admin/reports/updates/check' AND language IN('pl', '') ORDER BY language DESC in /home/pawi/domains/serwisowo.info/public_html/includes/path.inc on line 69.
* user warning: MySQL server has gone away query: SELECT s.lid, t.translation, s.version FROM drupal_locales_source s LEFT JOIN drupal_locales_target t ON s.lid = t.lid AND t.language = 'pl' WHERE s.source = 'No information is available about potential new releases for currently installed modules and themes. To check for updates, you may need to run cron or you can check manually. Please note that checking for available updates can take a long time, so please be patient.' AND s.textgroup = 'default' in /home/pawi/domains/serwisowo.info/public_html/modules/locale/locale.module on line 376.
* user warning: MySQL server has gone away query: INSERT INTO drupal_locales_source (location, source, textgroup, version) VALUES ('/admin', 'No information is available about potential new releases for currently installed modules and themes. To check for updates, you may need to run cron or you can check manually. Please note that checking for available updates can take a long time, so please be patient.', 'default', '6.9') in /home/pawi/domains/serwisowo.info/public_html/modules/locale/locale.module on line 392.
* user warning: MySQL server has gone away query: DELETE FROM drupal_cache WHERE cid LIKE 'locale:%' in /home/pawi/domains/serwisowo.info/public_html/includes/cache.inc on line 175.

Welcome to the administration section. Here you may control how your site functions.
You do not have any administrative items.

Warning: MySQL server has gone away query: INSERT INTO drupal_watchdog (uid, type, message, variables, severity, link, location, referer, hostname, timestamp) VALUES (1, 'php', '%message in %file on line %line.', 'a:4:{s:6:\"%error\";s:12:\"user warning\";s:8:\"%message\";s:3033:\"MySQL server has gone away\nquery: UPDATE drupal_sessions SET uid = 1, cache = 0, hostname = '83.31.50.157', session = 'messages|a:1:{s:5:\\"error\\";a:7:{i:0;s:261:\\"user warning: MySQL server has gone away\\nquery: SELECT data, created, headers, expire, serialized FROM drupal_cache_menu WHERE cid = 'links:primary-links:page-cid:admin:1' in /home/pawi/domains/serwisowo.info/public_html/includes/cache.inc on line 26.\\";i:1;s:269:\\"user warning: MySQL server has gone away\\nquery: SELECT p1, p2, p3, p4, p5, p6, p7, p8 FROM drupal_menu_links WHERE menu_name = ' in /home/pawi/domains/serwisowo.info/public_html/includes/database.mysql.inc on line 128

huh anyone can help me?

Page is working, every post is working, but i can't go to admin section.
I have no clue what's going on