7
Silly question, but what version of XOOPS are you using? This may not work in 2.x if it was originaly made for 1.x, unless it has been updated.
Assuming that you have all your versions in order I've also noticed that if a template file has the wrong syntax it will produce a blank page. It might help if you re-upload your files, or just the template files to be sure. If not, I'm not sure on how else to fix this for you. More information as you progress would be an asset
*edit*
I just noticed you 'are' running on 1.x, (I think) so I don't know how I can assist. Sorry for the misleading post.