Can't access printer shared on a Domain Controller - Logon unsuccessful

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http://serverfault.com – I recently setup a Windows Server 2003 R2 machine to be a domain controller, kind of to experiment with that whole concept. Originally, it was sharing a printer attached to it to my home's workgroup, although it had been awhile since I had used it. Now, I'm trying to access that printer from a computer that's in the workgroup, but not the domain. I'm trying to re-add it on this computer (which is running Windows Vista Ultimate x64 SP2), and I can't seem to log onto the "Everyone" builtin account like I used to. I'm assuming that this is some sort of security policy that was brought in by the (HowTos)