For some reason, if I log into my WordPress dashboard, I get logged out of my bbPress forum. When I log into my bbPress forum, I get logged out of WordPress.
I followed all of the instructions correctly, and the installation told me it validated my information and it’s all correct, so why is it not letting me stay logged into both at the same time?
You can achieve so by following this tutorial – http://blog.ashfame.com/2009/07/integrate-bbpress-10-with-wordpress-28/ and then keeping the bbPress integration plugin active on WordPress side (it is responsible for generating bbPress admin side cookies when you login from WordPress).
So see where you missed out and get it back on track. Let me know if you are stuck or lost.