Difficulty setting up my adsense and CafePress on my blog

What kind of site is it? Your own hosting and domain? or something like a sub-domain of some free host? If this is the case then ask your hosting service provider to assist you. How do you build your website? I mean custom template or a ready-made template, and if your using a WYSIWYG Editor then rechek your codes:) Hope it helps, i never had such problems so can give more advice:P