Halion 4 Installing problem

I can not install Halion 4 properly. First disc install properly but second disc not. It do not install all sound library. It announced “sound file xxx can not find”, “retry” or " cancel". Retry do not help and when I push “cancel” it stop installing and says “Halion 4 installed succesfully”. That is not true. Many sound missing and there is a big backround noise. I have an external USB-disc drive.

Can anybody help me please?