Problem by the Registration

I’ve got a problem with BlindWrite (Version
When I put the button “Unlock” the programm says
me: "Problem by Unlock: the systemclock is’nt correctly. "
When I click on the Ok button, the programm is closing.
(I have the German Version, I translate the messege.)
Please can anybody help me?

Did you purchase an unlock key?
If so please send me your registration details by email…

Hast du einen Freischaltcode gekauft?
Wenn ja, schick mir bitte eine Email mit den Registrierungsdetails…