HELP ! MMP + Spektrum RX = cutting out ?

So I went and bought a MMP to run my Ballistic 4.5 550 in my Hyper and it will cut out for a second when I hit the throttle or turn alot under throttle . You can see the light on the RX go out like its loosing power .

I have tried a glitch buster cap but that really didnt help , I have the latest software in it also .

Am I going too have to get a BEC also ? I was running a Novak Havok Pro before this and I NEVER had this problem ?

I also run 4 Mamba Monster systems WITH Spektrum RX's in different R/C's and they do not have this problem either !