This is the Activation message i got!
"Your subscription to Half-Life 2 Retail Standard has not
been completed, because Steam is currently too busy to
process the transaction.
However, you can play Half-Life 2 Retail Standard in the
meantime, and we will get back to you with the results of
your transaction as soon as we are able to process it."

P.S: Forgot to mention it took nearly and hour to get to that message!