Collect and save wont work

[nite ryder]

Here is what it says when I try to collect and save. The file "/Volumes/2 TB /ableton/Backup from 11-1-10/super beatmapped 1-10-11 Project/super beatmapped 1-10-11.als" could not be opened. This harddrive that I have it on was used with a pc to make this project. I am trying to save all the files and clips and the tracks they came from , on a seperate harddrive for backup, and I switched to mac. I saved a copy or this project to another hard drive. However when I loaded the project in live, from the newly saved coy it said all the files were missing. I dont want to find each original wav or mp3 file for each clip. I want to save a copy to another hard drive, but I want it to transfer and save everything, so I don't have to look them up.