[SV6000]

Hey Jordan.
There are a few things i can suggest.
1. I had all of these problems. To get the flasher program to connect with the controller start the flasher program. plug in the usbcom, turn on radio and plug usb into MGM, hit search on flasher program and than turn on the MGM. if it comes up with an error all you need to do is unplug the usbcom from the usb drive on the PC and than plug it back in and hit search again. Once it has found it hit download and than update following the prompts. But remember it is important to turn on the MGM ESC at the right time. Also the usbcom has to be unplugged and plugged back in every time you do a new search. You could also try updating the firmware on the usbcom itself. Do you have the flasher set to update device through USB??
As for your programing your radio there are a few things you can try. 1st the motor beeps on the NEU i found very very weak you really have to listen. I would say that you need to have the radio channel in reverse, i know you said you tried it but try it again, also try setting it up through the controller software first and than pairing up your transmitter. Also when in "controller" try playing with the neutral range i have to set mine around 12% or it wont work. Make sure that your servo cable from the ESC is plugged into the receiver, that had me going for about 30 mins once before i clicked. You could try running another receiver and a hump pack, I am running a castle bec and it works fine. I dont know about the DX3R but on the 3PK you can adjust the radio neutral point make sure that is where it is supposed to be and also that the radio is NOT in 70/30, it needs to be in 50/50.