I agree with both answers above - there must be a portion you didn't complete.
I had this problem on a recent cruise because it wouldn't accept my wife's registration as being complete because I had correctly stated that she was leaving the ship early. I never could print hers out, but we had no problems geeting on the ship.
However - it did appear that they never got her request for a certain kind of cuisine.
I am the editor, but I also speculate, ask questions and play devil's advocate. I reserve the right to change my mind.