Benko Gambit Declined Against David Kim

I played in LA Masters on Saturday, Nov 12, 2011. In the first round I faced a vastly underrated player David Kim.

The game started out innocently enough as a Benko Gambit Declined. Somewhere along, I thought I saw a forced win, and went in for the combination. Unfortunately, it was a flawed combination, and I lost.

The root cause of this flawed combination, I later realized upon reflecting, was that I thought the rook moved like a queen. This same error occurred again in another game, so,  I am wondering whether I am alone in mistaking the functions of one piece for another.

Here is the game: