How do I turn on the debug log for log4net?

[jo...@yahoo.com]

Hi,
 
Our log4net loggers aren't working and I don't understand why.  They just stop logging and when I change my log4net.config file they sometimes just print the start log and end log lines and don't log anything else.  I've gone through the XML files up and down and I don't understand what's going on.
 
I'd like to turn on the debug so I can look at log4net's own logs and see why it is failing.  How do I do that?  Where does it put the logs?
 
Thanks,
-Johan