when enter go to admin/modules this massage show Fatal error: Call to undefined Fatal error: Call to undefined function update_manager_access() in /home2/elifegyp/public_html/domains/ibnsina/modules/system/system.module on line 110 how to slove it


Try clearing caches. However, it sounds as though the code where the function is defined is missing. A quick search tells you that this code should be in update module http://api.drupal.org/api/drupal/modules%21update%21update.module/functi... so check that a complete copy of that module is present.

cant slove again

do you mean that you have checked that the file update.module is there on your site?. If not, go and have a look to see whether it is there.