General :: Unable To Access Windows Shares Or Printer Over Network

I've got my other networking problem (mostly) solved, but now I'm having other issues.I was previously able to access the shared folders on a Windows machine on the network essentially by default. Now whenever I try to navigate to the shared folders graphically (either through Places->Network->Windows Network->(workgroup name here), or through a custom shortcut on the deskop), I get a message: "Failed to retrieve share list from server". I have no idea what I might have done config-wise (or install-program-wise) to screw it over, but something's definitely not working...it's been like this for a good many weeks, and I've just dealt with it, seeing as how I don't normally use that shared folder much anyway.

What's really ticking me off now, though, is that long before this started happening, I had set up a printer share with the same computer (using the graphical tool that comes with Ubuntu), and that worked excellently to start out. Recently, however, when I tried to print from the same printer (after the "Failed to retrieve share list" message started showing up), it would sit there and show "Pending"; it wouldn't print at all. Then I tried deleting the existing entry and creating a new one, figuring a new, fresh configuration would be created. However, when I tried to add a printer via the graphical tool (same as I had done before), it's telling me that "No printer was fount at [that] address".