I think they did it knowing no one has that many points. That way the beta is up and ready to download, but not available yet to play until the 48hr closed beta is finished. East coast didn't start getting closed beta emails until around 8am. So my guess
is 8am est for the open beta to start.
I had this problem with this beta also. I also had this same exact problem with the Halo Reach Noble Map Pack DLC the way i fixed that was i added it to my download queue from the Xbox Live website from my computer and i had no problems there. Only thing
is, is there a way to add this Battlefield 3 beta to your queue from the Xbox Live website or possibly the Dice website? Not sure but I am trying to find a way around this glitch.