adding libraries of 2 versions in the runtime.

Hi,

   I am using Websphere studio Application developer5.1.2 where in the same test
server i have to run two EARs. these two EARs have Wappers classes written that 
use log4j of different versions for logging so while starting the server. one of
the Applications fails.

one of the application's  wrapper class is using deppricated method og log4j.so
i have to use these 2 versions of log4j.

My problem is how can i specify the different versions of library in the runtime
of the test server.

I tried to add one log4j in one of the EAR but that also fails.


Thanks 
Arun K S