Its Not Enough Items, not Too Many Items. TMI sucks compared to NEI. If its not showing, try pressing "O" as in Octopus. If that doesn't work, make sure it, and Code Chicken Core are installed correctly. Finally, make sure your in Cheat mode.
BTW, Forestry Iodine and NEI button will only allow control, not permanently disable it. So for example, it starts raining, just press the NEI button and it will stop within 10 seconds or so.