log4j generating logger file but not appending anything

Question

The settings I have specified in log4j is as follows:

log4j.appender.F2=org.apache.log4j.RollingFileAppender
log4j.appender.F2.File=E\:/Documentum/logs/dflogger.log
log4j.appender.F2.MaxFileSize=10MB
log4j.appender.F2.layout=org.apache.log4j.PatternLayout
log4j.appender.F2.layout.ConversionPattern=%d{ABSOLUTE} %5p [%t] %c - %m%n

log4j.logger.com.myorg.mytbo.tbo=DEBUG,F2

I am trying to log information from inside TBO (defined in package com.myorg.mytbo.tbo) which is essentially a JAR deployed on jboss application server inside EMC Documentum Content Server. This specific information about Documentum server shouldn't be any concern since it still uses org.apache.log4j. When the TBO runs it creates dflogger.log but does not append any information inside it.

I suspect many reasons like:

• File is getting created in readonly mode.
• or may be there is some issue associated with logging for com.myorg.mytbo.tbo, for which this is somewhat similar thread, specifying PARENT_FIRST option in websphere. But I am using jboss, so if the issue is similar then can anyone tell if I need to modify jboss settings?