Can't reactivate CS2 on the same com...

Can't reactivate CS2 on the same computer after reinstalling Windows XP. Original purchase was a download on 12/29/06, Receipt/Order #AD000561677, Customer # ADB0302631455. Original serial # was 1045-1488-9372-5461-5421-2125, new # received from Adobe customer service tech today is 1045-1978-6820-1611-3699-3401 - case #202562952. Neither number works. I've dealt with 3 different Adobe techs today. I've uninstalled and reinstalled the program 5 times. The program operates fine, uninstalls and reinstalls effortlessly, but it needs something special to reactivate on the same machine. Each day the program warns me there's one day less before it stops functioning. I need some professional help. Mike Hosch, San Pedro, CA.