Hello, I am quite new Java development and don't have much experience troubleshooting problems. When I type in ant test (or just ant) from the xmlsecurity installation folder, I always get the error... BUILD FAILED file:C:/XML/XmlSecurityJ/build.xml:436: taskdef class ant.Md5Task cannot be found Now, I can see this file in the ant folder, so am I not setting some environment variable properly or something? Second I want to compile the xmlsecurity java project to be used with jdk 1.3.1. Is this supported? Thanks.