Can I somehow replace the log4j with the latest alpha (log4j 1.3 alpha 6)?

I tried to just replace the log4j jar with the new one, but I got the following error:

09:31:20,671 INFO [Log4jService$URLWatchTimerTask] Configuring from URL: resource:log4j.xml
09:31:20,734 WARN [ServiceController] Problem creating service jboss.system:type=Log4jService,service=Logging
java.lang.IncompatibleClassChangeError
 at org.apache.log4j.joran.spi.JoranDocument.resolveEntity(JoranDocument.java:125)
 at org.apache.xerces.util.EntityResolverWrapper.resolveEntity(Unknown Source)
 at org.apache.xerces.impl.XMLEntityManager.resolveEntity(Unknown Source)
 at org.apache.xerces.impl.XMLDocumentScannerImpl$DTDDispatcher.dispatch(Unknown Source)
 at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown Source)
 at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)
 at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)
 at org.apache.xerces.parsers.XMLParser.parse(Unknown Source)
 at org.apache.xerces.parsers.AbstractSAXParser.parse(Unknown Source)
 at javax.xml.parsers.SAXParser.parse(Unknown Source)
 at javax.xml.parsers.SAXParser.parse(Unknown Source)
 at org.apache.log4j.joran.JoranConfigurator$1.parse(JoranConfigurator.java:87)
 at org.apache.log4j.joran.JoranConfigurator.doConfigure(JoranConfigurator.java:153)
 at org.apache.log4j.joran.JoranConfigurator.doConfigure(JoranConfigurator.java:90)
 at org.apache.log4j.xml.DOMConfigurator.configure(DOMConfigurator.java:61)
 at org.jboss.logging.Log4jService$URLWatchTimerTask.reconfigure(Log4jService.java:624)
 at org.jboss.logging.Log4jService$URLWatchTimerTask.run(Log4jService.java:563)
 at org.jboss.logging.Log4jService.setup(Log4jService.java:450)
 at org.jboss.logging.Log4jService.createService(Log4jService.java:466)
 at org.jboss.system.ServiceMBeanSupport.jbossInternalCreate(ServiceMBeanSupport.java:233)
 at org.jboss.system.ServiceMBeanSupport.jbossInternalLifecycle(ServiceMBeanSupport.java:215)
 at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
 at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
 at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
 at java.lang.reflect.Method.invoke(Method.java:585)
 at org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:141)
 at org.jboss.mx.server.Invocation.dispatch(Invocation.java:80)
 at org.jboss.mx.interceptor.AbstractInterceptor.invoke(AbstractInterceptor.java:118)
 at org.jboss.mx.server.Invocation.invoke(Invocation.java:74)
 at org.jboss.mx.interceptor.ModelMBeanOperationInterceptor.invoke(ModelMBeanOperationInterceptor.java:127)
 at org.jboss.mx.server.Invocation.invoke(Invocation.java:74)
 at org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:245)
 at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:644)
 at org.jboss.system.ServiceController$ServiceProxy.invoke(ServiceController.java:950)
 at $Proxy0.create(Unknown Source)
 at org.jboss.system.ServiceController.create(ServiceController.java:342)
 at org.jboss.system.ServiceController.create(ServiceController.java:281)
 at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
 at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
 at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
 at java.lang.reflect.Method.invoke(Method.java:585)
 at org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:141)
 at org.jboss.mx.server.Invocation.dispatch(Invocation.java:80)
 at org.jboss.mx.server.Invocation.invoke(Invocation.java:72)
 at org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:245)
 at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:644)
 at org.jboss.mx.util.MBeanProxyExt.invoke(MBeanProxyExt.java:176)
 at $Proxy4.create(Unknown Source)
 at org.jboss.deployment.SARDeployer.create(SARDeployer.java:229)
 at org.jboss.deployment.MainDeployer.create(MainDeployer.java:919)
 at org.jboss.deployment.MainDeployer.deploy(MainDeployer.java:773)
 at org.jboss.deployment.MainDeployer.deploy(MainDeployer.java:737)
 at org.jboss.deployment.MainDeployer.deploy(MainDeployer.java:721)
 at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
 at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
 at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
 at java.lang.reflect.Method.invoke(Method.java:585)
 at org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:141)
 at org.jboss.mx.server.Invocation.dispatch(Invocation.java:80)
 at org.jboss.mx.interceptor.AbstractInterceptor.invoke(AbstractInterceptor.java:118)
 at org.jboss.mx.server.Invocation.invoke(Invocation.java:74)
 at org.jboss.mx.interceptor.ModelMBeanOperationInterceptor.invoke(ModelMBeanOperationInterceptor.java:127)
 at org.jboss.mx.server.Invocation.invoke(Invocation.java:74)
 at org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:245)
 at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:644)
 at org.jboss.mx.util.MBeanProxyExt.invoke(MBeanProxyExt.java:176)
 at $Proxy5.deploy(Unknown Source)
 at org.jboss.system.server.ServerImpl.doStart(ServerImpl.java:434)
 at org.jboss.system.server.ServerImpl.start(ServerImpl.java:315)
 at org.jboss.Main.boot(Main.java:195)
 at org.jboss.Main$1.run(Main.java:463)
 at java.lang.Thread.run(Thread.java:595)