MWS process not used

Hi I build and deployed a process in MWS. I published the documentType that kicks off the BPM process. I could get the process started and completed status in the server log but when i check the Business process in MWS it still remains un used and in monitoring tab i couldn’t see the instances. I could see all the instance details properly logged in the database. I’m not sure what I’ve missed when I deployed the process. I’m in a critical situation to solve this issue as I’m supposed to deliver it today to client. I’m attaching the screen shot for your reference.Please help.
MWSError.jpg

Is that test projetc for which you are getting expection is realted to process model in question ( say refrence model )? which wm version you are??