Serial make no Fullversion

Hey together,
sorry for my english but i have a problem.

I have days acquired a license a few and entered the Key. Everything went as it should. Now I had to replace a VM HDD and after starting the VM win the demo version is me again displayed. I then tried to enter the Key again, this is not accepted. I can make the demo no Full Version. It remains the stand may be connected to only one device. How do I resolve the error, I need urgent help. Thanks a lot