Lol, yea there is a moh1 section I believe. But yea, I had the same problem. I never found out if it was a faulty code or something else. Check to see if you have infinite health on the campaign mode and if you have it online (it may be an infinite health only on campaign mode kind of code). Also, there is probably a few infinite health codes that have been made, so check those to. Put them in your DB and see if any work online, they will probably say on the code if it is online mode or campaign only, if not you can ask the creator or test them out in game.