URGENT: Problem with ? in url's

[eluser]Bramme[/eluser]
Okay, I'm in trouble and I need a solution fast.

I have just uploaded the new mickm.com website (if anybody knows it), anyhow it's built on CI, everything (sorta) works and I'm pretty proud of it.

This site also has a phpbb3 forum that just sits in a subdirectory. Now phpbb3 uses query strings with index.php?blahblah and what not. Now those don't work.

I've tried setting enable_query_strings but that didn't work...

I'm guessing it has something to do with my htaccess file, which looks like this:

Code:

Options -Indexes
Options +FollowSymLinks

DirectoryIndex index.php
<IfModule mod_rewrite.c>
    RewriteEngine on

    RewriteCond %{REQUEST_FILENAME} !index.php
    RewriteRule (.*)\.php$ index.php/$1
    
    RewriteCond %{REQUEST_FILENAME} !-f
    RewriteCond %{REQUEST_FILENAME} !-d
    RewriteRule ^(.*)$ index.php/$1 [QSA,L]
    
</IfModule>
<IfModule !mod_rewrite.c>
    ErrorDocument 404 index.php
</IfModule>

Is there any way to completely exclude the /forum/ directory from the url rewriting? If yes, please provide me with a concrete piece of code. Thanks in advance!

This is rather urgent as there's a bunch of people looking at me to correct this mistake. Thanks in advance for helping me out!