Well of course it would ban you if you arent careful. Cant just keep aimbot going nonstop. And I'd bet you were either votebanned or banned by an actual admin.
I just did a full round of Co-Op and kept the aimbot on the entire time. And had no interruptions. I'm not gonna lie. It's pretty good for a free hack. Make sure you change the dll file name also. Just to be safe.
By the way, I've noticed what people are saying about a damage hack. I've noticed when it's not super long range, it's generally 1-shot everyone. Not all of those kills are necessarily headshots either. Don't know what it is.