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Can someone please help, i have entered my activation code and its telling me registration unsuccessful. I have had this game installed before on a different computer. Now that ive upgraded and want to reinstall its not letting me reuse the code. Can anyone help?
 
Can someone please help, i have entered my activation code and its telling me registration unsuccessful. I have had this game installed before on a different computer. Now that ive upgraded and want to reinstall its not letting me reuse the code. Can anyone help?

I had difficiulties using my code too. Had to try it half a dozen times - then I noticed that I entered O (the letter) instead of 0 (zero) and it worked ;-)