My game crashes when I inject hack?

I have Counter Strike 1.6, downloaded it from steam, I am trying to download an aimbot which is vac secured. I download the hack, open it, it says "looking for hl" I start the game and it crashes.

Sometimes it does not crash but the hack does not work, and nothing happens when I press insert.

I have tried making it Open GL and windowed mode, changed to compatibility mode. When I open Counter Strike and join my own server, and then go inject, it just makes it go "Half Life has crashed"

What can I do?

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