Internal Injection.

okay so my cheat injects for me but when my friend trys nothing happens...

it used to work for him to so i dont get it...

yes, i've tried undoing and back tracking but nothing effects my hook or where i initialize or my key binds..

yes, he tried all sorts of injectors
yes, he tried different injection methods

things i thought would fix it:
microsof*****m/download/details.aspx?id=15478
microsof*****m/download/details.aspx?id=8109
microsof*****m/download/details.aspx?id=48145
none of those worked..

please help!
please dont -rep me for asking a question.
please dont tell me to 'learn coding' when you've only learned from sites like this....
Thank you!

Provide some more information. Is he getting an error?