How to make a copy of Freelancer

[celador]

I'm trying to make a copy of Freelancer with Alcohol 120% but can't seem to make it work.
This is what I do. I put the original cd in the burner and make an image on the HD with the.mds format (is this right?).
After this is done I burn the image on the fresh disk.
After this the program won't start from the copyied disk.
Does anyone have any suggestions or what am I doing wrong?
Thanks in advance.

Jorge