try using jdk1.5. i got the same problem when using jdk1.4. after switching to the latest one, it works.
I use the latest JDK1.5, for sure. The problem is the missing LOG4J jars.
I found a log4j.jar from another JBoss folder in their distro and copied it over to ..../deploy/ejb3.deployer. Now the first exception disappears, but the second, about log4j-core.jar kills me!
I downloaded the latest log4j package from Apache and it seems to be structured differently - there is no log4j-core.jar file inside.