I open photoshop->Help->Updates, then I proceed to download. It reaches the end and then pulls up message "There was an error downloading this update. Pleas quit and try again later." Each time it is the same story. I clicked on the Customer Support link and it brings up

Creative Cloud Help /

Error "This serial number is not for a qualifying product" | CS6, CS5.5, CS5

So that was no help. What do I do?