Error in invoking a process in JBoss Cluster

Hi,
I have recently installed LC 8.2 on a JBoss 4.2.0 Cluster. The OS of the 2 cluster nodes are Windows 2003 R2 Enterprise Edition SP2.
And the database is SQL Server 2005 Ent. Ed. installed on another Windows 2003 R2 Enterprise Edition SP2.
I have created a simple process on the first node of the cluster. When I invoked the process through Workbench, I get ALC-DSC-003-000: com.adobe.idp.dsc.DSCInvocationException: Invocation error. with the following root cause:

Caused by: javax.naming.NameNotFoundException: adobe_JmsQueueXA not bound
at org.jnp.server.NamingServer.getBinding(NamingServer.java:529)
at org.jnp.server.NamingServer.getBinding(NamingServer.java:537)
at org.jnp.server.NamingServer.getObject(NamingServer.java:543)
at org.jnp.server.NamingServer.lookup(NamingServer.java:296)
at org.jnp.interfaces.NamingContext.lookup(NamingContext.java:627)
at org.jnp.interfaces.NamingContext.lookup(NamingContext.java:589)
at javax.naming.InitialContext.lookup(InitialContext.java:351)
at org.jnp.interfaces.NamingContext.resolveLink(NamingContext.java:1063)
... 142 more

I get the same error even I close the second node in the cluster.
How can I fix this error?

Thanks