Yes, I'm sure the problem is the theme. I have been trying contact with the author since some days ago, but I have no response. It seems not a good support (the oposite of you!).
If you have an idea, please, I need it
If not, I will try to have the same navbar with the
vB options, and if I can't, well... then, I will make a menu, with my own drop down menu, and maybe without the options about register users.
I will try!
Thanks and regards!