jervonics

I installed PT Boats and had a good time playing the tutorials and the first mission. I took a few days off for the holidays, and when I came back to the game, My steering would not work. Nothing I do will make my A(left steer) or D(right steer) work. This includes remapping the controls to other keys, re-installing the game and deleting the original files and doing a complete fresh install. I have never had this happen in my long years of simulation gaming. Any ideas as to what might be causing this? Thanks for the help...... Frustrated and confused.