bk 9920 esc not working...

[I Trust Tyler]

So the other day im running my emaxx (9920,7xl,16-18cells, had this setup for about 2 years) then after about a minute, it stops and the throttle doesn't respond...oh eff. I take a look at it and discover that the receiver wire from the esc is melted(yellow,orange,brown..but just the brown is melted) im a little upset cause i figured i just blew this thing up. I check for wires that might be exposed and touching metal, i find a couple of spots (a small cut in the motor and a small cut on the receiver wire on the esc) i tape them up and test it. Works perfect, im totally psyched. I decide to take it behind my job where there is a sick ass sand pit with huge drops and inclines. I beat the piss outta it for a good 20 minutes, battery drops off and i decide to head back to my car and go home. The next day i charge the batts and im psyched to go beat it up some more...i plug everything in and hit the throttle...nothing....the steering works but there is no repsonse from the throttle. I switch out receivers and still nothing. I strip the heat shrink from the esc and can't find anything visibly wrong i replace the receiver wire and still nothing...this is where im at now, any ideas ppl? Thanks