server eror when i try to upload movie clips or thumnails

[AmaizingPussy]

hi everybody!I am trying in all ways to upload movie clips and thumbnail ,on my profile and always in the middle of uploading process appear an eror from server.like this:


Server Error

Sorry but an error occurred on the server when processing your page request/submission.  Please contact the Site's admin team via the Help Center, citing the URL of the page you were on and the action you were attempting.
If you were uploading pictures, then try uploading fewer or reducing the quality/size of the ones you are uploading.
Please accept our sincere apologies for the inconvenience this has caused you and thank you for your p..

what I should do if I tried everything?