Error while adding WebSphere in Eclipse

I am trying to use WebSp开发者_开发问答here v6.0 with Eclipse. When I try to add the runtime server for a Dynamic Web Project, I get the following error:

Missing classpath entry \your_server_root\was-6.0\properties

Why?

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My thought? Add that entry to the CLASSPATH.

Another thought would be to ditch WebSphere and use Tomcat, JBOSS, or Glassfish.