ERROR 213 LICENSING

I KEEP GETTING THE FOLLOWING WARNING ON MY NT 4.5 SERVERS EXCEPT FOR THE PDC. THE WIN 2000 SERVERS ARE ALSO NOT ERRING.
I HAVE CHECKED THE RCP SEVICES AND THEY SEEM TO BE WORKING FINE.
Replication of license information failed because the License Logging Service on server \\SERVERNA01 could not be contacted.