"Page Not Found" error

Guyse, I gots the problems.

Huge fan of puzzles, but lately, I can't access giveaways that are in the following format: http://www.steamgifts.com/giveaway/N43aZ (<--random 5 char code)

I get a page not found error for links like that. If i do know the name of the game, and add it to the end of the url like /N43aZ/Skyrim , then it works.

But simple URLs with just the code at the end don't work for me. Anyone else have this problem? Any fixes?