Some error I get when I try to post

[Articas]

Internal Server Error

The server encountered an internal error or misconfiguration and was unable to complete your request.
Please contact the server administrator, and inform them of the time the error occurred, and anything you might have done that may have caused the error.
More information about this error may be available in the server error log.
Additionally, a 404 Not Found error was encountered while trying to use an ErrorDocument to handle the request.

im sorry im new to this does anyone have any idea how to fix?

[sunils]

Where do you exactly get the error, while trying to post here or in your forum. Any way please raise a service ticket at support.x10hosting.com

[Articas]

I get it when I try to edit, delete, post or try to send pm's out and such I basically cant use the forum.
Edit:
in my forum

[galaxyAbstractor]

You need to upgrade to intermeditate PHP in your AMP.

*wrong section, closed*