Make sure your wires are folded nice and neat in the receptacle box with the gfci in it. 2' of wire, (plus the size of the gfci )is a lot of wire if your talking about a standard size outlet box. You only want to have 6 to 8 inches max coming into the box. Your ground ( bare copper wire in romex) could be making contact with the hot terminal on the receptacle, sending your voltage straight to ground instead of through the receptacle to your dish washer. Hopefully in pulling that much romex from the wall didn't pull it from another junction box or right out of the panel. In which case you would have to run a whole new wire. Other than that, like the previous gentleman said. Hit test then try to reset, if that doesn't work check your install. Make sure you are wiring to the "LINE" side of the GFCI with your power in. Honestly if the gfci was working before and then stopped all of a sudden. Make find out if it's the gfci tripping or the breaker itself. If it's the breaker ,make sure you have the right size wire and breaker for the amp draw on your dish washer. And if it is the gfci. I'd be willing to bet it's a loose connection on your terminal. Or your voltage is all going to ground from do much wire in your outlet box. Hope this helps.