Messages getting redirected to non related log file

[Peake, Chris]

I have a program that logs messages to the console and a file using the
correct appenders.
Works great, until I call a 3rd party tool that seems to be co-opting my
logger somehow.
As soon as that program is encountered, ALL MY messages start going to
his log file and no longer
to MY logfile.
My appenders are all named differently.
 
I can't seem to find the root cause.
 
I've tried various releases of log4j.
 
Any ideas?
 
thanks,
 Chris