N4S TestDrive on Linux - got no valid license key

One question ...

I installed the newest N4S testdrive on a freshly installed 10.3 Suse 64-bit system. Everything went smoothly to the point where I requested the license: I got an email with a license key, but not as documented a <license>.rpm. Well, so I used the command

saplicense -install

to enter the license key manually. But to my surprise the saplicense program wants a license key with only 24 characters, whereas the license key mailed by SAP is far longer, it has 424 characters!

I tried to use part of the license key only, but without success. Any solution?

Regards and thanks in advance

Joachim