license key renewal 2004s ABAP

Dear all!

I've got a NW2004s ABAP demo system on my pc running. After the first installation I updated the license key as recommended in SAP How To Guide for License Keys of NW2004s ABAP demo systems.

Right now I have ONE license installed, running until 2006-09-05!

I like to install a license renewal before expiration of the current license. Requesting a license key on www.sap.com\technology\minisap, I received an email that my license key is still valid...

I read about huge problems after expiration of current licenses...

Is there a way to install a valid license in advance?

How can I avoid problems with my license in the next days?

Thank you!!

Christoph