Cubase 6 LE - no valid license found

Hi All,

i have an issue with my Cubase 6 LE.

I followed the instructions (installed as admin) registered product in elicenser.

If i open the elicenser, on the right side i see Cubase LE 6.
(hovering over this leads to a message at the bottom: "This ‘full’ licence allows to use the product for an unlimited time period)

So for me everything seems to be OK.

However if i start the Cubase 6, it says: no valid license found. I can click ‘Start Licence Activation’, but there i should give my activation code, which i have already used directly in the licenser - therefore it says: “The activation key has been already used”

Any idea, how i could solve this?

Many thanks in advance,