you are likely to be banned... in fact you might already be flagged and they will ban you later.
this trainer is for campaign offline mode.
if you use this online, you are asking for trouble..
I had the same thing happen to me. I actually started the game up and went into Zombie Mode and then unplugged my internet. Game still let me start up a Solo Match. Used the trainer and everything was working fine but a few weapons weren't infinite. My point is that I wasn't even connected to the internet, hard for them to ban me if I'm not on the internet.