eclipse/tomcat/jboss/mysql

hi guys...

i am doing the eclipse-tomcat-jboss-mysql integration but i just cant get to
see why jboss wont start properly; hes a snippet of the error i am getting:

[MainDeployer] Starting deployment of package:
file:/C:/jboss/server/default/deploy/mysql-service.xml

15:14:32,078 WARN [NestedThrowable] Duplicate throwable nesting of same base
type: class org.jboss.deplo yment.Deploymen tException is assignable from:
class org.jboss.deplo yment.Deploymen tException

15:14:32,078 ERROR [MainDeployer] could not create deployment:
file:/C:/jboss/server/default/deploy/mysql-service.xml
org.jboss.deplo yment.Deploymen tException: create operation failed for
package file:/C:/jboss/server/default/deploy/mysql-service.xml; - nested
throwable: (org.jboss.depl oyment.Deployme ntException: Trying to install an
already registered mbean: jboss.jca:servi ce=LocalTxCM,na me=MySqlDS)
at org.jboss.deplo yment.SARDeploy er.create(SARDe ployer.java:202 )
.......