connect to internet but not network

So ive got these two computers and they can connect to the internet but not to each other. they are on the same workgroup but when i try to access that workgroup (called simply WORKGROUP) under My Network Places it comes up this message:
Workgroup not accessible
A list of servers for this workgroup is not currently available

both comps are using Win2k Pro and are connecting to the net via DSL that plugs into a NetTopia hub. The ultimate goal is to get them to share a printer.

Can anyone help?

in this situation additional hardware isn't an option, but thanks for the idea.

Tell me more about getting the comps on the same subnet if you don't mind.