Licence renewal doesn't work after expiration of the licence

Hi,

On our system the pro licence expired a week ago.
We purchased a renewal licence, but activating it doesn't work.

When I start up, the message is:
Licence expired on wed june 24 .....

In the next screen I can add a licence.
When I add my renewal licence, I get the errormessage:

You need a valid licence to install a renewal licence.

We have 3 systems with this problem.
Can you please help me with installing the renewal licences ?