Remote access validation problem

Unable to authenticate using Dial-up remote access with Windows98 into a RAS/W2K

When I try to connect to my RAS with Windows 2000, I am able to connect and access the internet through the network firewall. But I can not access any resources and/or the Scripts does not execute to connect to various shares on others server belong to the domain. I usually get the error message: Unable to Validate in the Domain? How can I login to the RAS but still not access my recourses (Shares/drivers) on the domain?

I am using a fixed IP Address assigned by the RAS Server on W2K.

Thanks..

YS