user error: Table 'drupal.attachment' doesn't exist

I am getting following error.

user error: Table 'drupal.attachment' doesn't exist
query: SELECT aid, fid, filename, size, hidden FROM attachment WHERE nid = 10 in c:\program files\apache group\apache\htdocs\drupal\includes\database.mysql.inc on line 125.
user error: Table 'drupal.attachment' doesn't exist
query: SELECT aid, fid, filename, size, hidden FROM attachment WHERE nid = 9 in c:\program files\apache group\apache\htdocs\drupal\includes\database.mysql.inc on line 125.
user error: Table 'drupal.attachment' doesn't exist
query: SELECT aid, fid, filename, size, hidden FROM attachment WHERE nid = 8 in c:\program files\apache group\apache\htdocs\drupal\includes\database.mysql.inc on line 125.
user error: Table 'drupal.attachment' doesn't exist
query: SELECT aid, fid, filename, size, hidden FROM attachment WHERE nid = 6 in c:\program files\apache group\apache\htdocs\drupal\includes\database.mysql.inc on line 125.
user error: Table 'drupal.attachment' doesn't exist
query: SELECT aid, fid, filename, size, hidden FROM attachment WHERE nid = 5 in c:\program files\apache group\apache\htdocs\drupal\includes\database.mysql.inc on line 125.
user error: Table 'drupal.attachment' doesn't exist
query: SELECT aid, fid, filename, size, hidden FROM attachment WHERE nid = 4 in c:\program files\apache group\apache\htdocs\drupal\includes\database.mysql.inc on line 125.
user error: Table 'drupal.attachment' doesn't exist
query: SELECT aid, fid, filename, size, hidden FROM attachment WHERE nid = 3 in c:\program files\apache group\apache\htdocs\drupal\includes\database.mysql.inc on line 125.
user error: Table 'drupal.attachment' doesn't exist
query: SELECT aid, fid, filename, size, hidden FROM attachment WHERE nid = 2 in c:\program files\apache group\apache\htdocs\drupal\includes\database.mysql.inc on line 125.
user error: Table 'drupal.attachment' doesn't exist
query: SELECT aid, fid, filename, size, hidden FROM attachment WHERE nid = 1 in c:\program files\apache group\apache\htdocs\drupal\includes\database.mysql.inc on line 125.

Please help me to resolve this issue.It is urgent.