Theme header never shows up - and it's the main image to my site

http://westernchristianciv.altervista.org/

Hello. I make my own themes in Artisteer, so they're code-compliant.

This is the second time I've opened an account at Altervista trying to upload this particular web site. But the THEME is always broken, the HEADER is always missing.

I've tried shortening the theme zip name. No dice, header still broken.

Can anyone please suggest how to fix this? Thank you.

Well, the file isn't there: http://westernchristianciv.altervist...ges/Header.jpg
It looks like it's at http://westernchristianciv.altervist...ges/header.jpg, notice the lower-case h. URLs are case-sensitive, correct the file name, or the code. However this looks like an Artisteer bug, I'd suggest you to report this issue.