I sure did!
Yes, I had that problem two days ago! I tried a few things, and I don't remember which thing fixed it, so try these: Re-login to your iTunes account. If that doesn't work, stop airport, then restart it, then login to your WiFi connection using the WiFi password. If that doesn't work, try repairing your permissions using the Disk Utility (Applications > Utilities > Disk Utility). That should solve your problem. One of those did the trick for me (that was all I tried), but honestly, I think it was the repair permissions thing. Sorry I don't remember. I was frazzled at the time. I don't react well to iTunes telling me I can't download what I just bought. 😱 Hope that helps!
