JCoverage Eclipse Plugin?

Has anyone every tried installing the jcoverage plugin for eclipse? I tried but it doesn't seem to work. I followed this step to "Add jcoverage nature" and Eclipse does nothing. Doesn't move, no change, nada. Then it says to complete the license information screen. Umm. What license information screen? I can't do anything after this. The view opens, but that's it. No pretty jcoverage charts =( Anyone ever have any luck?