Need help about a hack

all yesterday i been trying to use hacks but they never worked now i just speed hack or something to try out and can you guys give me a tutorial what to do cause am new here

Explain better please so we can help you.

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sorry for delay i was on crossfire ok what i am mean yesterday i had try a few hacks that have to inject from this site but then when i login and start game i press hotkeys nothing occurs but what i only really want is a speed hack so if you guys can help out thanks alot