TELNET Disconnections only with some emulators

More Fun with Telnet....

Pre cum-PTF package, I would successfully connect from a 95 box with CA
Express, Windows Telnet, Mocha, TN400 (Delphi) or  Nexus Mainframe Terminal.

Suddenly, I can not maintain a connection using either Mocha or TN400.  CA
Express, Windows Telnet and CA Express all seem to work fine!!!

The symptom is that I connect and log in OK, but within 30 seconds or so,
the session drops.  The error message on the AS400 is:

                         Additional Message Information

 Message ID . . . . . . :   CPF5140
 Date sent  . . . . . . :   02/27/00      Time sent  . . . . . . :
08:01:08

 Message . . . . :   Session stopped by a request from device TN400D1.

 Cause . . . . . :   The request shutdown was caused by either the user
turning
   the power off, by a device error, or the ASCII controller inactivity
timer
   expired.
 Recovery  . . . :   Close the files and vary the device off (VRYCFG
command).
   If the problem occurs again, enter the ANZPRB command to run problem
   analysis.

Any ideas?

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