Ok slow down.
Now,
First of all. Does your Nuke site run fine with the default themes?
Are you running Nuke 6.0?
Are you also running the phpBB Forums?
Did you download that theme from this site?
IF you downloaded that theme from this site, did you upload the theme that was in the themes folder to your themes folder on your server leaving the file structure intact?
More info would help. Please don't just post a bunch of errors, that doesn't really help people trying to help you
mikem