[Zope] RE: zope 2.7.0: no tracebacks produced

I am making a big upgrade and moving my products from 2.3.1 on HP-UX to 2.7.0 on windows 2000 and can't get zope to produce any tracebacks when it encounters errors. I've checked all the log files and monitor stdout to no avail. All I get is a brief html message with error type and value and instructions to check the error log.

In the zope.conf file I have

debug-mode on

<eventlog> level ALL <logfile> path $INSTANCE/log/event.log level ALL </logfile> </eventlog>

<logger trace> level ALL <logfile> path STDOUT </logfile> </logger>

Any help here would be much appreciated!