Forum Vbulletin url's and links
 

hi, we've just moved to another hosting company, but now all the URLs don't work, until I remove the name from it, e.g. :
(This doesn't work) : /vb/forumdisplay.php?60-%E3%E4%CA%CF%EC-%C7%E1%D6%ED%E6%DD-%E6%C7%E1%D2%E6%C7%D1-%E6-%C7%E1%C3%DA%D6%C7%C1-%DB%ED%D1-%C7%E1%E3%F5%D3%CC%E1%ED%E4

and after removing the name,
(This works) : /vb/forumdisplay.php?60

it used to work before moving, what should I do now ?
Thanks in advance.

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This what I get when trying to open any link :

Not Acceptable

An appropriate representation of the requested resource /vb/forumdisplay.php could not be found on this server.
Additionally, a 404 Not Founderror was encountered while trying to use an ErrorDocument to handle the request.