RealVNC: Data Not In Database

Hello,
I have installed RealVNC 4.1 (Free Edition) on 1 Windows NT 4.0 SP6 Server and 1 Windows XP SP2 laptop. I can ping each system. I see each system in the browser respectively. I can move or transfer files between both systems. When I try to connect the laptop to the server, using RealVNC, I get the following:

“Unable to resolve host by name. The requested name is valid and was found in the database, but it does not have the correct data being resolved for. (11004)”

I went to the site for RealVNC, but was not able to find ANY data on the subject.

Has ANYONE had this issue with RealVNC??? If so, how did you resolve this…

Thank you,