Decrypting using AES / Crypto++

I'm trying to figure out how to decrypt a block of cipher text using AES. I am using the crypto++ library - or at least TRYING to use that library. But I'm getting absolutely nowhere. I assume that it is only a couple of lines of code to run this decryption algorithm, but I can't figure it out

 http://stackoverflow.com/questions/11277324/decrypting-using-aes-crypto