2000 Server - second NIC brakes DNS

[teknagon]

Running 2000 Domain Controller and DNS.
IP is 192.168.1.22
Pri DNS is 192.168.1.22
Sec DNS is external.

Installed second NIC.
IP is 10.30.20.22
Pri DNS is 192.168.1.22
Sec DNS is external.

Now "nslookup domain_name" returns 10.30.20.22 (should be the 192.168.1.22)
The entry in DNS zones for the domain_name only has changed to the new IP 10.30.20.22.
I edited it back to the original.
No luck.
If I disable the second NIC all is back to normal.

Ideas are appreciated.

Cheers.