Hack works for 1 game and dll problem

[Chicco]

hello to all sorry my bad English
Search the web I found a hack that works
for 1 game (better than nothing)
But my antivirus tells me that the dll
(what is injected) sees it as a Trojan virus
can someone give me an explanation? I am noob to these things
If any administrator then gives me permission I can post
Click to download and the procedure that I performed
THANKS