You could have a damaged dvd, or you may have issues with the dvd drive.
You could try making a disk image of the installer dvd's using Disk Utility. Then mount all the images and run the installer.
You could try using a different drive if you can beg/borrow one.
I'm having the same problem after returning the first set and getting a second set. Apple Support also mentioned it may be a damaged DVD Drive but I think not, after the Logic Studio install failure I installed FrameForge from DVDs and it installed like a champ.
I plan on getting Apple Support on the line tonight. The second set of Disks arrived yesterday and by the time I figured additional attempts were futile it was very late and I had an early morning to think of so I went to bed... not to mention my level of frustration would have surely be unleashed on the poor tech who happened to answer the phone.
If I learn something this evening I will come back and post what I learned.
I tried to load Garage band. THis is not loading up now.
Do you mean 'install' Gragaeband, or "start" the application?
Regarding the original issue with the Logic DVD's, have you tried my earlier suggestion of making Disk Images?
Apologize for the late response to this string. After some trial and error and testing at the computer repair shop it was determined my DVD drive was in fact the culprit. Sometimes it worked fine, other times not so well.
Apple replaced the drive and once it was replaced my Logic Studio loaded like a champ. However, I should add a caveat to this... When I attempted to load the first time and failed I removed, or thought I did, all traces of the install. But, when I started to load after the DVD was replaced I came across an issue that prevented me from selecting all the options on Logic Studio.
Long story short, there were remnants of the install attempt on my hard drive which lead the install application to believe that some of the Logic Studio programs were already installed; specifically SoundTrack Pro. I looked everywhere for remnants but found nothing. I eventually got Tech Support on the line and of course they ran me through the search process too and of course we found nothing.
The Tech had to walk me through entering several lines of code in the Terminal Command Utility to clear the previous install attempt.
Bottom line, got it done, got the program installed, life is grand... now all I need to do is learn how to use Logic Studio.