DNS Error : asap

We have a NT4.0 with IIS as PDC where we have loaded our web sites. We have MS DNS running as a primary DNS. My problem is sometimes in the Event viewer it starts giving a error message “DNS server sendto() function failed: the data is the error”. The message comes in a random way, sometimes, twice in a second, and sometimes once in five seconds. Sometimes it stops giving the error message automatically and again it starts automatically.

Will be grateful for any help.

Regards.

Sarkar