Questions about the Ecplise run J2ME?

Environment: ecplise+jwtk21+jdk1.4 runs a written program that flashes over the simulator. Then output failed to initialize WMA message routing support What is the reason AH. Please advise the Master

Positive solution:

I'm using Eclipse + wtk2.2, and that's also a problem. The WMA package was not found. The modification is to the Wtk22/lib directory, the Wma20.jar copy, the name changed to Wma.jar. will be able to use.
It is estimated that there is a problem with the configuration file, but I did not look for it. ^_^