WP at root domian, phpBB at sub dir. Mod rewrite problem

I have wordpress at my root domain and using permalinks structure like this
domian . com/post-name/

I have added phpBB at
domain. com/forum/

Now when I try to open any url like domain .com/forum/sd it shows wordpress page.

I want to exclude that path from wordpress.

 

just set the Reqrite Conditon for the forum
RewriteCond ${REQUEST_URI} ^/forum/*

 

The current of My Root .htaccess is

Where to add your code ?

 

I am planning to get myBB instead of phpBB as its more SE friendly..

 

paste it in the line just after rewriteBase /

 

Tried but nothing happened ...

Now I am with myBB ..Will do it in morning..Lets see what happen.

 

Try to install your forum at a subdomain (maybe a stupid idea, but sometimes it really helps)

 

If I add it on subdomain that it will be on different domain.

I did rock solid link building for that domain so if I add forum then I don't need to do anything