trasoami on "[Plugin: WP-Filebase Download Manager] Cheatin' uh? [wp 3.5.1, filebase 0.2.9.34]"

Hi,
I have the same problem too. I tried to install a new theme, Adventure but it is not working. When I activated it that
This page come up with this word: "Cheatin’ uh?"

Can you please help me.
Thanks