Ras connections W2K!!

I setup a RAS server so that our users can dialinto the network but also want them to have Internet access through our gateway. The phone dials and the modem answers and logs me in but I can’t go any further. If I try to connect to a web page (for example) it says it is unable to locate the address. DNS probably but the remote workstation (all W2kpros) all receive a 255.255.255.255 submask rather than our 255.0.
Ras is set for DHCP and a check beside use remote gateway. All are qualifiedusers or they wouldn’t be logged on.
How can I set our RAS to let our users use our Internet gateway?