HELP!! i need injector and engine help!

>.o i have an injector thing called Valkyrie 2.0. i know I'm supposed to run it while in game but nothing happens. i also downloaded a Cham from this website. i added to the injector thingy. and pressed inject, nothing happened. D: what do i do. >.o

Did you open your injector before you opened your Combat Arms?

Which chams did you get?

And what OS are you using? (Vista or XP)