Event Log Error and Shares are no longer available

We have a 2000 Server Standard that occasionally loses its shares.

I have possible tracked it down to the Event listed below:

I have followed the steps in KB 245080 (with the exception of the 1 gig file
creation)
http://support.microsoft.com/?id=245080

using the maximum values allow and then using the minimum values allowed
since the maximums did not work.

Most recently the issue has not happened in well over a month until
yesterday late. KB 245080 leads to this being a possible PST file problem.
Each time it happens I do an export of the open files (this is after the
crash and before the reboot, terminal services is still accessible).
However, most often there is a PST file open when this happens, there is not
a single instance where the same user's PST file is open each time.

Any troubleshooting advice from the experts?

Thanks.
Bart Perrier

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ~~~~~~~~~~~~
Event Type: Warning
Event Source: Srv
Event Category: None
Event ID: 2022
Date: 9/29/2004
Time: 1:08:24 PM
User: N/A
Computer: SELITNFP01
Description:
The server was unable to find a free connection 2 times in the last 60
seconds.

For more information, see Help and Support Center at
http://go.microsoft.com/fwlink/events.asp.
Data:
0000: 00 00 00 00 03 00 48 00 ......H.
0008: 00 00 00 00 e6 07 00 80 ....æ..?
0010: 00 00 00 00 9a 00 00 c0 ....s..À
0018: 00 00 00 00 00 00 00 00 ........
0020: 00 00 00 00 00 00 00 00 ........
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ~~~~~~~~~~~~