Deployment errors--server instance

Hi,when deploying, i got this error. can anyone solve me?Undeployment of component [testJMS] failed. Application testJMS is referenced by server and must be referenced by no server instances or clusters.Thanks
[237 byte] By [Message-Driven-Bean] at [2007-11-26 7:26:17]
# 1
hiPlease undeploy it from server instance or server such as:asadmin undeploy --user <username> --passwordfile <location of password file> --target <server_name or instance_name> testJMS
1xpert at 2007-7-6 19:15:02 > top of Java-index,Application & Integration Servers,Application Servers...