Hello,
...Did you click to
Change Product Key...?
http://www.petri.co.il/change_the_se...windows_xp.htm
Make sure that in steps 4 and 5, you click
Yes, I want to telephone a customer service representative to activate Windows but don't type anything or continue in this window. Instead click
Change Product Key at the bottom, and enter the Product Key there.
Your product key should be 25 alpha-numeric characters, grouped in 5 groups of 5.
Activate Windows by Phone uses an
Installation ID which consists of 54 numers in 9 groups of 6. This Installation ID is generated using the Product ID that was entered during the installation of Windows XP when it asked for a Product Key.