You need to find a stack trace to post here. Either use firebug to inspect the contents of that frame and get the stack trace from there, or try to find it in your server logs.
Since you are on Windows, also check the events log, make sure that your iw-webd is running. Also check jboss is running for your 7.2.1 or tomcat is running for your 6.7.2.
All of that is obviously running. Only one of the DCR's six Frames returns Application Error.Whatever the problem is, it is much more subtle than JBoss not running.
SIX Frames ? Never heard anyone using it nor i knew what it is. I tried to count but could get to only 5 frames