Not wanting to steal the thunder from Zak (6 posts below) but I have a
similar problem. However, The ipp webpage comes up on my Windows XP
machine and I can select and install a printer fine. Works as designed. I
have a Windows 2003 Terminal Server which doing the same procedure
immediatley returns a Winsock 10060 connection time out error.

There is no delay, the Windows Server seems to not even think about
negotiating with the printer link. Does Windows 2003 block something that
I may not be aware of. The built in firewall service is disabled. The
server is working fine otherwise - NIC card = Intel 1000mbps full duplex.