I have the same problem in JBoss 3.2.6. Have you solved the problem? If so, how?
You are probably getting this error on the "Problems" view:
"The project was not built since its build path is incomplete. Cannot find the class file for org.apache.axis.encoding.AnyContentType. Fix the build path then try building this project"
This is not letting Eclipse to compile source, hence org.jboss.Main class is not present.
Solution would be locating Axis JAR where is held org.apache.axis.encoding.AnyContentType interface.
Hope this helps!
One more thing,
You can always try building with ANT bundled with Eclipse IDE. Use the "run ant.." option in the context menu (right mouse click) over the build.xml file under "build" directory.