WD Smart Ware pro on XP

I load 2.4.16 WD Smart Ware Pro 30 day free trail on Windows XP. It worked fine. I purchased to pro and got the code but I can not get the software to except the code. I just get error has occurred try again later. Any Idea what going on. I turn off my firewall with out luck.

Yes, this happens, try again later. If it doesn’t work right in a couple of days then notify WD. You should see a link at the bottom right of the page for contacting WD.

I have tried many time over many days without luck. Thank for your answer I have contacted WD