Can't get a few of the codes to work

I'm able to use your force host and god mode for black ops, but i try to use the force host and god mode codes made for mw3 but they don't work. well, sometimes they do, but only for me once every 20 games i'd say. other codes like infinite uav and unlock all weapons and stuff like that work fine, but the god mode and force host don't :/ anything i might be doing wrong? I'm not very experience with codes so i may of derped  
 I'd be grateful if you could let me know what i need to change

Depending on what force host code your using, sometimes you can't pull host because your ping is worse then the host's ping. And for godmode, um...im guessing it migrates to someone else?

So the force host doesn't work because of my bad internet?

Yes. You need to run the no migrate codes anyways.

I don't run force host but take host like a pro  

ok thanks you guys, i'll try to sort my internet out now (:

I recently upgraded my internet to 6.000 DSL and I never failed to host with force host codes, before I occasionally did with only half the speed. The threshold must be somewhere close to this.