Error OWS-05721 using Oracle WebServer

Hi, I'd like to know if you can give some advice on the following situation:

I've installed and configured Oracle WebServer 2.0.1 on a Pentium machine running Windows NT 4.0, and there's an application accessing an Oracle 7.3 database (Workgroup Server) installed on a SCO Openserver (5.0).

The application had worked OK for several days, but today, suddenly, while accessing the database via OWA, something happened and it was frozen. On the Web Listener Administration page we could see the listener (lsnr01) was stopped (??). Tried to restart it, then I got:

OWS-05721: The Web Listener lsnr01 failed to start: Pê

Yeah, it's supposed that following the OWS error message is some other text explaining the situation, but what we get are those characters (Pê , they appear every time there's an error) so I'm not able to track the errors. I also checked the .err and .log files but can't find anything about it. If I try to stop the listener, I receive a message saying that it was not possible to stop it, and again the garbage characters are below the error message. As far as I know nobody has changed the configuration for the listener, DCD's or WRB. Both machines can talk to each other (ping, telnet to SCO, SQL*Net tnsping).

There was no way to start the listener, and the NT machine was rebooted, and then the listener was succesfully started. After a while, when calling a procedure on the database, we got an error saying:

An application error has ocurred and an application error log is being generated

               WRB.exe

Exception: access violation (0xc0000005), Address: 0x00ca82de

I don't really know what it could be (a version problem or something??), and I would greatly appreciate all the help you can give.

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