ORA-12637 Error

Hi,

my problem just started yesterday--with no known system changes, a client running 8.1.6.0.0 (oracle client) now fails to connect to an oracle 8i server running on win2k (the client is also a win2k server). No other clients have a problem. The error i get is ORA-12637: Packet receive failed. I've checked the tnsnames.ora and sqlnet.ora files, and they are exactly like everyone else's. the funny part is if i bounce the listener on the oracle server, this client can then connect--albeit for only a short time (about a minute or so). i am testing the connection with net 8 assistant...i've tried using the 8 and 8i connection strings to no avail
(i.e. the compatible mode). The listener.log looks ok even when the client
reports the error:

17-AUG-2001 11:09:37 *
(CONNECT_DATA=(SERVICE_NAME=MyService)(CID=(PROGRAM=C:\Program
Files\Oracle\jre\1.1.7\bin\jrew.exe)(HOST=MyHost)(USER=chris))) *
(ADDRESS=(PROTOCOL=tcp)(HOST=XXX.XX.X.XX)(PORT=1435)) * establish * ids.sec
* 0

I removed and reinstalled all of the oracle software on this computer...before i did this, i was getting a No listener error, and now, after the re-install, i get the 12637 error. TNSPING has always worked
(though i know this doesn't actually perform a connect...thus the net 8
assistant test)

Please help!!
Scott

SafetyNet Technologies, Inc.
Los Altos, CA
650.917.1701 Received on Mon Aug 20 2001 - 12:50:49 CDT