OpenSAML user discussion

Hello all. 

I was trying to build openSAML for JVM 1.3.1 target environment and what I 
did was to try to build under JVM 1.3.1.
When I try to build openSAML under JVM 1.3.1 with "<property 
name="javaversion" value="1.3" />" in the build.xml, I received the follwoing 
error

bad class file: C:\opensaml\lib\xmlsec-20050514.jar(org/apache/xml/
security/c14n/CanonicalizationException.class)
class file has wrong version 48.0, should be 47.0
Please remove or make sure it appears in the correct subdirectory of the 
classpath.

It seems that xmlsec-20050514.jar was compiled with JVM 1.4 or higher. 

If I build usuing JVM 1.4, I receive other error when I use the openSAML in 
JVM 1.3.1 environment. 

Is there any way to build openSAML for JVM 1.3.1 target environment?

Thanks in advance.