I want to shutdown a secured JBoss 4.0.5 from the commandline

Running ./shutdown.sh -s jnp://localhost:1099 -u admin -p xxxx -S from the commandline just results in this error:

ERROR: transport error 202: bind failed: Address already in use ["transport.c",L41]
ERROR: JDWP Transport dt_socket failed to initialize, TRANSPORT_INIT(510) ["debugInit.c",L500]
JDWP exit error JVMTI_ERROR_INTERNAL(113): No transports initializedFATAL ERROR in native method: JDWP No transports initialized, jvmtiError=JVMTI_ERROR_INTERNAL(113)

Is there a way to achieve what I want?