Thanks again for the help guys, but you're not going to believe what I found. The latest version of the driver is the problem. When my IT department does an install, they always download the "latest and greatest" versions of all software and drivers from the website. This time all I had to do to get this to work was to use an older version of the TWAIN driver (version 3.33). I tested this today while installing a 1060 on the network of another client that was already running NetNEUI and it worked, so I am not yet sure that my client with the original problem won't have to run NetBEUI also (Ricoh Tech Services said they would, but my IT guys are not excited about using NetBEUI), but I'll find out tomorrow. I also wanted to let you know that my Service Mgr. found the same thing you guys did concerning XP and the firewalls, but the client is running 2000 Pro and there were no firewalls to bypass. But at least I'll know what to look for next time when it won't work on an XP workstation!
Thanks for all the quick responses and I'll keep you posted on the final outcome.