Launching the game problem

[sh1roi]

Hey guys.I'm new guy here.I'm having a problem with the game.Before I apply the patch,I have no problem and I can launch the game well.But after applying the patch,I can't launch the game.It says error launching the game ,securom disk not found please contact http:securom.net for further information.
Please can someone tell me what is happening with the game and how to fix it?Any help would be appreciated