Question : DNS server on XP Workstations keeps changing from DC to my gateway

This one is urgent!!

I have a Windows 2003 Server which houses my DHCP and DNS server.  It has been working fine for months.  All of a sudden my users can't print, they print directly to the printers via a TCP/IP port, which are configured to look by DNS Name. (Sharp.Corp.XXXXX.com).  My DHCP server is supposed to serve up 3 dns entries to the clients
192.168.1.7 (Master AD DNS Server)
192.168.1.8 (Secondary AD DNS Server)
192.168.1.1 (My router, incase all else fails)

I removed all the entries except the .7 entry, restarted the server.  Deleted all the leases, released and renewed a workstation.  It initially had 192.168.1.7 as the DNS when you do a IPCONFIG/ALL.  10 sec later if you run the command again, it goes back to 192.168.1.1 which is my router.  I've checked, there are no group policies affecting this, I don't have many and they all serve up drive mapping scripts.

HELP!!

Thanks

Answer : DNS server on XP Workstations keeps changing from DC to my gateway

Sounds like your router is issuing DHCP?
When you do an ipconfig /all what address does it give as the DHCP server?