Can't see the Thread
 

when i click to the thread it's shows 500 internal Server Error
do any one know how to fix?

That's a server error, not a vbulletin error. Check your error_logs and maybe something is in there about it (if you don't know where your error_logs are, ask your host).

let me check that

--------------- Added [DATE]1244841287[/DATE] at [TIME]1244841287[/TIME] ---------------

there is nothing says about this?

Then talk to your host about it. Like I said, it's a server issue.