JxMapviewer problem

I am trying to add a jxmapviewer control in my form using net开发者_运维知识库beans and when i drag the object from the palette I get the following error.

A java.lang.NoClassDefFoundError exception has occurred. Please report this at http://www.netbeans.org/community/issues.html, including a copy of your messages.log file as an attachment. The messages.log file is located in your

I have imported the control from the swing-ws.jar "as a jar file".

Any idea what am I doing wrong?

Thanks

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I found the problem, I had the following jar files missing.

 swingx-bean.jar
 swingx.jar
 swing-worker.jar

Thanks anyway.