I need help setting up xboxlive.

So, I just bought my pre-paid card and when I'm about to redeem my code, it says: "Can't retrieve information from xbox live. Please try again later." and below that it says code" 8016a04b...

What's that mean?

"Several Xbox Live error messages are triggered by temporary service outages or potentially brief instances of home-network interference, any of which may hinder your access to Xbox Live. These messages consist of the following:

• "Can't connect to Xbox Live. Please try again later."
• "Can't retrieve information from Xbox Live. Please try again later."
• "Can't retrieve your membership info from Xbox Live."
• "Can't load your gamer profile. Please try again."
• "This action cannot be performed at this time. Please try again later."
• "Xbox Live Marketplace is temporarily unavailable. Please try again later."

If you receive one of these messages, check back later or restart your Xbox 360 console and then try again. If your problem persists, it may be evidence of a problem with your home network or your Internet connection."

-Xbox Web Site

If you can't resolve the issue yourself, the issue doesn't resolve itself, or you contact your internet provider and they can't resolve it, I would suggest calling Xbox customer care at 1-800-4-MY-XBOX.

Good Luck.