I'm not sure where marky has gone with regards to supporting this. He would be able to help you more. I imagine the link does nto work due to the lack handling of Javascript coding from menu control. Is the # the actual url or just there as an example?
If it is needed, the # charater may not be recognised either. But have you tried putting it in as
www.forumurl/# rather than just #
alternatively you'd need to look at adding a multiple menu.