I am not familiar with that version but I think I can give you some hints.
1. When you load the game and reach the main screen , what is displayed at the right bottom corner? If it is v 1.4b then it is already patched and nothing needs to be done.
2. If No1 is not the case , then have you chosen the correct patch;
ie for US customers , Europe customers DVD or download version of the original game
I hope I helped.
Good luck
