Ok here's what my cups web set up looks like.
http://img168.exs.cx/img168/6137/cups4om.jpg
The printer is shared as LJ on my windows printer named "dave", in the workgroup "home". When I put in the device URL I put it in like this: smb://mike@home/dave/LJ. I didn't put a password in because that is how I connect to it with smbclient. Whenever I try to print to it, it just shows as an error, doesn't matter what user I use (as you can see in the screenshot.) Anyone know what I should do? Thanks in advance for your help.