Theme Zip File Not Working

Theme Zip File Not Working


Hello,
I've been trying to put together a custom theme, using the ThemeRoller
application (http://jqueryui.com/themeroller/) but once I've
downloaded the resulting ZIP file, my ZIP program tells me there's an
error with the file and won't open it.
I've tried both WinRAR (what I usually use) and WinZip. Neither was
able to open the file.
Thanks in advance.......