To connect to the latest jBPM 5.0 task service, you need the Drools Eclipse plugin 5.2.0.M1 or above.
To see the image of your process in the process instance view, you must make sure that the plugin has successfully parsed the process before you start debugging. Make sure you have automatic building turned on in Eclipse and save the process (for example move a node slightly and then save the editor so that the Eclipse builder will parse this changed process). If you do that, does the process isntamge show up?
Kris