Problem with install Train 2009.
Excuse me for my english. I'm french.
 
I just downloaded this software, but I can not install it. 
After entering the CD key (I juste suppose that it's the number in the e-mail...but it is not clear), it makes me: "Unfortunately, the code of your CD is wrong or installing trainz did not complete successfully. Please reinstall Trainz 
What do I do? 
I reinstalled several times, nothing makes. 
Thank you for helping me