How to fix Internal Server Error (500)??

[kiarati_kawin43]

My site show this Error massage when use mySQL how to fix this error?
Sorry I Not good at English.

MySite: http://thaidevjr.elementfx.com/forum/
Internal Server Error

The server encountered an internal error or misconfiguration and was unable to complete your request.
Please contact the server administrator, no-reply@x10hosting.com 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.

[Livewire]

Change the permissions on the forum folder to 755, you have them set at 777 which is a security loophole and thus the server prevents execution of any file within that folder.

Once that's done, change all php files to 644, and all folders within the forum folder to 755 as well. If it's still erroring after that, post back.

[kiarati_kawin43]

Thank you, Solved then.
Sorry I Not good at English.