I tried again on my server but I didn't get the white screen as you mentioned. But anyway I found a few other issues and there's a new features implemented. So I just issued a new version. Can you download the newest code here: http://www.ubercart.org/files/uc_cano-1.1.tar, and try it again?
1) Disable the CANO module;
2) Uninstall it;
3) Overwrite with new source code;
4) Enable CANO again (you should now see 1.1 as the version).

Everything should work without problem. If not please don't hesitate to let me know. Thanks!