SBS 2003 with Win 98 SE - "Out of Memory"

Hi,

I've just installed SBS 2003 on one machine in a network that was initially
Win98 peer-to-peer.

Now, on my Win98 SE machines, whenever i click the "Network Neighbourhood"
icon, i get an error "Out of Memory" followed by the message "There is not
enough memory available to run this program. Quit one or more programs, and
then try again."

I then need to re-start the Win98 machine and i get full access to the
network, but after about an hour or so, the same story repeats itself.

Can anybody help me out here please.

Thanks in advance.

Manoj