Re: user's can't add new post
How about a little more information?
What happens when they try?
What happens when you try?
Any error messages?
What version bbPress?
Integrated with WordPress? If so, what version WordPress?
Stock theme or custom?
Any plugins active?
Has it ever worked or never worked since installation?
What host are you on?
You never know which of these items will be important, but starting with a little information is better than nothing.