Unable to use TwentyTen Weaver theme

I had an issue with timeout being too short, that’s been extended, now when I try to preview the theme I get a white screen in the Previewer – I still can’t use the theme. This is a new installation, my blog has only a few posts and comments, and it’s a straightforward personal blog with no sales angles to it – yet. Any help getting that theme working would be nice, I just want to be able to tweak colors and fonts. I have changed the header picture and the background color, that functionality comes in TwentyTen – but I’d like to do more ??