I am able to import your bpmn2 into jBPM Designer:
https://community.jboss.org/servlet/JiveServlet/downloadImage/2-647013-17785/450-206/Screen+shot+2012-01-16+at+11.41.41+AM.png
and save it fine. Could you maybe place your logs into a file and attach on this thread cause it's very hard to read pasted as it is above.
