After uploading your processes to guvnor, do you see them in the processes category of the defaultPackage when opening up Guvnor? And did you build the package on Guvnor after uploading the processes (select defaultPackage and click the build button). If that succeeded successfully, you should be able to see the processes in the process list.
If not, could you check the server log for any indication (exception trace) what might be going wrong?
Kris