DCOM connection to program 'Synsopos.exe' failed.

Hi everyone - my computer crashed recently and I had to reinstall all my programs, Cubase 5 being one of them. Now I get this message when I try and open it. Something to do with the license?
Can anyone help, please??

Application ‘Cubase 5.0’ has caused the following error:

DCOM connection to program ‘Synsopos.exe’ failed.
Error:The server threw an exception.