could not access CD-ROM Repository


I have installed QNX on my computer and i am a real beginner in this thing.
I have opended the Package installer and would like to open the CD-ROM
Repository, but that does not work (A Error message would appear: “Could not
access repository”).
Accessing a repository does only work with the internet (I just have
installed files from the internet). But i don’t want to install from the
What do I make wrong?

Thanks for any hint

Marco Wehnert