Sims Vacation back up CD-Will not install

[stocky1]

Can somebody help??
I have made a back up copy of the original CD, using CloneCD settings for safedisk2. My Burner is a LG 8120B. Using this method it has worked on other programs in the past.
However with Sims Vacation during installation from the backup CD, after I enter the serial no. a message pops up (enter the correct CD) and installation then fails!

Thanks in advance.