Unlock Code Not Working?

[Dutch64]

I understand your frustration, but if you have these kind of problems, another code will not help. Your first code should be sufficient.
When you uninstall fsp, please check the fspassengers folder also and remove it (since you're starting from scratch no need to create a backup). After
that, go to the modules folder and delete fspassengers.dll.
Now, important, reboot your pc, reinstall fspassengers and unlock it. This should do it.
You're using Vista I guess? I have to say i don't use vista on my 'game-pc' but maybe there might be a small issue also, perhaps others here with
vista can shed some light on this.