mysite.com/members/membername/ - Not Found

[postcd]

Hello,

im facing issue im not able to find the cause.

mysitenamehere.com/members/membernamehere/ is the url im redirected to when i click some username on my forum.

On this page, has been getting Database error "... database has encountered a problem."

After disabling hook system and VBSEO, im getting:

Not Found

The requested URL /members/someusernamehere/ was not found on this server.

Additionally, a 404 Not Found error was encountered while trying to use an ErrorDocument to handle the request.

Please help me to disable this non working redirect. I did not found any issue in .htaccess, hook system appears to be disabled .

When i change vbulletin Friendly URLs in Settings, it links to example: member.php?81835-membername
but again returns "Database error" please how to debug?

--------------- Added [DATE]1387034879[/DATE] at [TIME]1387034879[/TIME] ---------------

//UPDATE: FIXED
From Maintenance menu, Diagnostics, i did "Suspect File Versions" and it found some version mismatches. I decided to backup all files into a ZIP file and also mysql. Then uploaded original files fromv bulletin member area and run /install/upgrade.php script which fixed the issue.