DNS bad key

I have upgraded my NT4 server to Win2K SP1. I found the following errors in the Event log. They are:

1) Source: NETLOGON, Event ID: 5775
Deregistration of the DNS record’_ldap._tcp.gc.msdcs.xyz.com. 600 IN SRV 0 100 3268 xyz.xyz.com.’failed with the following error: DNS bad key.

2) Source: NETLOGON, Event ID: 5774
Registration of the DNS record ‘xyz.com. 600 IN A 192.168.0.3’ failed with the following error: DNS Server unable to interpret format.

Any help is very much appreciated.Thank you in advance.