Do you have a Capacitor (1000+ UF, Maybe 10volt to 16volt) you can solder on a old servo lead and plug it into the battery channel on your Receiver.
My MMM was going nuts without it. Actually cutting off all response...
Something like this:
http://www.amainhobbies.com/product_...iver-Capacitor
You can make one much cheaper though if you have access to an electronics store...