PC game Dead To Rights how to start ?

when i install the game install successfully but after instaal i play Deat to right a windows appear on screen gamespy register i dont know what is this i download this game 1.22 GB but why not starting and i register i fill all things but they ( We are sorry, but based on the information provided we are unable to process your registration ) i dont know whats this plz help me give me solutions plzzz .

Make your birthdate 1980 so you pass the age requirements.