Master Browser

I have a small domain with a PDC and BDC and 2 Terminal servers all on a NT 4.0 platform, about once a week I have one of my TS servers diconnect with the following event in the event viewer:
The master browser has received a server announcement from the computer MyBDC that believes that it is the master browser for the domain on transport NetBT_NETFLX1. The master browser is stopping or an election is being forced.

Data: Words

0000: 00000000 004a0003 00000000 c0001f43
0010: 00000000 00000000 0000055a 00000000
0020: 00000000 00000000
Any Suggestions?

Thanks,
JB