Apache Axis version

Is there anyway to control the version of Apache Axis WebObjects uses  
on a Mac?

Our application must be deployed on machines with axis 1.4, and also  
machines with older versions of axis.

I'm trying to get our app to use an older version of axis, but when  
ever i System.out.println(org.apache.axis.Version.getVersion), i get  
"Apache Axis version: 1.4 Built on Apr 22, 2006 (06:55:48 PDT)"

I've tried putting an older version of axis.jar in /Library/ 
WebObjects/Extension, but this seems to have no effect.

Is there another axis.jar i need to replace?