What Copy Protection does Gothic German use?

[Arminator]

I did a Clone CD Backup of Gothic, however the Game still tells me to insert the original CD. So since ther is no Gothic crack around, what Copy protection does Gothic use? Since there is no gothic.icd file, is it possible, gothic uses SafeDisk v2? But the generic crack doesnt work :-(
So is there a crack for Gothic somewhere (no matter if No-CD or a crack enabling me to play my backup)?

Thanks in advance for your help!