hl2.exe crashes after injecting hacks

When I try to inject any of these hacks for CS:S it will crash the application.

The directions say to start the hack and then start CS:S but it just crashes right as it is about to begin.

I have also tried starting CS:S and then starting the hack but then the hack does not.

How can I fix this?

Make sure the application is undetected.

The next step you might want to take is to disable DEP.

Disabling Windows DEP (Data Execution Prevention)