Re-install Cubase 7 Elements

Hi
I have had to re-install Cubase 7 elements and it is requesting a new licence activation code.
When I go to software reactivation om my steinberg it asks for a new soft e-licence number but i don’t know how to obtain this .Can anyone help?
Thanks Steve

http://www.steinberg.net/forums/viewtopic.php?f=25&t=25117