CUPS shows print completed but no print?

[dan mcmanus]

> > I have a Canon MX860 running on a wireless network.  A desktop running Vista has no problem printing.  I have CUPS set up to print from a laptop running puppy Linux.  (wireless internet on theis same network works on the laptop.) CUPS found the printer complete with correct IP address during set up.  When I send a print file, it will show as pending then completed in CUPS but nothing actually prints.  Any suggestions?
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> This is pretty much what happens to me as well.  Except my printer is hooked up to a Mac.  My Ubuntu desktop has no problem printing, but when I go to print from my laptop, both mine and the mac's CUPS show it as completed but nothing actually prints.  I'd like to know