Can only login to UIE Forum if access is set to "administer forum"

Hi folks,

I've installed Uieforum in two of my test sites. It works fine if a user is set as having rights to administer the forum, but I get "access denied" if the user is set to only access or access and post to the forum - they can't even read the forum topics list. I've looked in Access Control and Roles, but everything seems to be as it should. Any ideas as to what I'm missing? Its only Uieforum - users can access and create other forms of content (where they're allowed to).

Many thanks

Colin