Plcsim not working

[Kummimuhv]

I have installed S7 5.3 sp3 and now I added Plcsim 5.3 with license key.
The probelm is that when I open simulator it shows me no plc windows and nothing happens when I click on new simulation.

In the bottom right is MPI=(here is nothing)

Can anyone tell me what's wrong ?
How can I get Plcsim to work ?

[Doc]

http://support.automation.siemens.com/W ... ery=plcsim protool&SearchArea=alle&id=13283804&F11Marker=false&siteid=cseus&query2=&modelled=S7%2DPLCSIM%3BProTool

or in http://support.automation.siemens.com
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PLCSIM PROTOOL