Please post a link to your website.
To use phpBB3 (Sorry, I forgot this) you must have x10's PHP v2 (Intermediate).
To get PHP v2, go to
http://x10hosting.com/account
(Login with your forum username and password, nadeems and your password)
Select PHP Intermediate, use "Advanced PHP Scripts" as the reason why.
Do not select PHP Advanced, they will not give it to you for that reason.
Again, a link would be very helpful.