bbPress.org

You don’t even need a plugin for this.

You just need to fix your cookie settings and it will work instantly.

Set all cookie paths to the root /

and make sure they are all using the same key/hash which is likely the problem.

You didn’t say which version of bbPress you are using, it appears to be 1.0.2

I don’t think I’ve ever bothered to figure out all the new variable names under 1.x which is why you can’t find them around here.