whoa wait a minute. I read you rpost to quickly. Template Config

How did you install the theme? Did you downlaod the right one?
That message means that your Forums are using a template that is not in your modules/Forums/templates directory or doens't have a theme_info.cfg file

This looks like you installed the theme incorrectly.
All you do is upload the theme to your themes folder as-is. DO NOT CHANGE anything.
Then just select the theme from your account page.
Do not change ANYTHING on the Forum side.