Scanning to Computer(Network) with WIndows 7 on WorkCentre 6015NI - SMB 031-529 Login failed

I'm setting up a new Xerox WorkCentre 6015NI and I'm running into trouble with scanning to a PC on the network.

I've set up a folder in the Users directory called Scans and shared it with Everyone.

Here is my setup in CentreWare Internet Services:

The computer is part of a domain, but the user 'jeremy' is a local user - per a request I've seen elsewhere on this forum.

After various settings adjustments I'm still gettin an SMB error: 031-529 Login Failed

What does this error mean? What could be causing it? Anything else I can try to resolve this?

Thanks in advance!