Problem to open a new trial version of Elements 7

I try to open Cubase Elements 7 trial version I installed today but in vain…
I have properly installed and activated version 5 LE. I know that is possible use two versions, so it shouldn’t be a problem. Nevertheless, after installation I restarted my computer (PC) and try to open Cubase El7 but I have this information all the time:

Application ‘Cubase LE / AI / Elements’ has caused the following error:
Unknown GetInfo command received:

When I try to close it, I receive the next one:

No valid License found. The program will quit now.”

I read that CEL7 doesn’t need to be activated in trial version.

Could you help me?