[otrs] ITSM 2.0

Hi, I installed latest ITSM 2.0 module. I do not understand however how Change State is modified. State machine shows what are the possible transitions, but I do not see any way to change the status of the Change State. I made a try, and all my WorkOrders are in State Closed. However my Change State is still Requested, and no menu give me the possibility to change this... For info, I am administrator of the tool, I have all rights enabled. Regards Olivier