Having trouble creating new blogs!

If I install simple-forum plugin, do I have to add something to the config in multidb? I tried adding a blog from the dashboard and from the wp-signup.php and all I get Is a white blank screen. I'm guessing Its the Simple-Forum plugin, because Its suppose to add a forum to each new blog and maybe that's the problem.

Test:
http://restasure.jblogs.info/

http://jojo.jblogs.info/