Tiger - 2006-05-25

I has an xml file contain:
<taskdef resource="net/sf/antcontrib/antlib.xml">
            <pathelement location="${ant.home}/lib/ant-contrib.jar" />

The ant version I used is 1.6.5, and the latest ant-contrib.jar

In Windows, ant loads up all the classes in ant-contrib.jar while a partial classes are loaded up in Linux.

Class net.sf.antcontrib.property.RegexTask loaded from parent loader (parentFirst)
+Datatype propertyregex net.sf.antcontrib.property.RegexTask

It is loaded up in Windows, but not Linux

What is the problem? Can someone help me?