Please help this Amiga 500!

Lets try and help this guy out, he is trying to hook the young! I got a call yesterday from this guy who was looking for a disk drive for an Amiga 500, he is trying to set it up for his young niece. As luck would have it, a disk drive was the only piece of Amiga hardware that I have, so I went down there today to set it up for him. Unfortunately, it seems that the problem is not the disk drive but the floppy controller (i think). Not being fortunate enough to have owned an Amiga myself, I am at a loss. Here is the problem in brief: The machine will display the little picture asking for the disk... Put the disk in, and the drive is polled, but doesn't read it, so it ask again for the disk... I tried my drive in the system, with the same result (hence thinking it might be the controller)... I'm not exactly sure if it is the right disk he has, he ordered it from Toronto at a cost of $26.00 (can), it says Amiga workbench, however I am not sure if that is really what is on it... I would appreciate any help or suggestions from anybody who might have come across this situation before. Remember: This guy is setting this up for his young niece, who calls every day asking if it is ready yet. I think its great to get the young into classic computing (my own nieces just call my machines door stops, and call me a geek for having them ;) ---------------------------------------------------------------- ______________________________________________Live from the GLRS The Man From D.A.D ----------------------------------------------------------------