Thanks everyone for your advice. Everything made sense. So I thaught I've got a radio box, I'll use it. Now it looks like this with the receiver in the radio box and aerial mounted on the radio box. Now I'm really confused. It made no difference what so ever.

What else can it be???
If I go 2.4Ghz will it definately work or will I still have the same issue??? Could it be the speed controller??? Although its a new Mtroniks esc. Please help!!!