How do i disable forum.php ?

[harpreetxi]

I mean i visited some forum , when i visit them i visit the url like hissite.com

But on my forum , it redirect me to mysite.com/forum.php

How do i stop this redirection to "forum.php"

[harpreetxi]

bump...still need this help

When i visit my forum.mydomain.com it referees me to forum.mydomain.com/forum.php

i don't want this forum.php , i saw 1 website it openes in forum.hisdomain.com , it don't refer to forum.php...how to i disable my forum's referring ?

[harpreetxi]

bump...still need this done