Not Collecting Logs for NT 4.0 Servers

I installed WMI on two NT 4.0 Domain Controllers and added them to EventLog Analyzer where they worked fine for a few days. However, it has now been several weeks since EventLogAnalyzer has picked up the new logs from either server. Here's what I've tried so far:

1) I installed WMI according to your EventLogAnalyzer instructions, and it says it's running fine on both NT 4.0 servers
2) EventLogAnalyzer has them both at a green status
3) I manually scanned multiple times with no success
4) I have deleted the servers and readded them. I verified the login on both and it is successful, but still no logs.
5) The NT 4.0 servers show a login success audit entry in the Security Log when EventLog Analyzer tries to connect.
6) I restarted the WMI service on both NT 4.0 servers without success.