CHIRP

I downloaded the mac OS Chirp.
I downloaded the memories from my VX-6R to the Chirp program with no problem.
saved the file as a .img
I cannot get the updated file to upload to the VX-6R. I estimate the upload bar stops at about 25% and then I get the ERROR on the VX-6R screen.

I am running OS X El Capitan 10.11.2
I am using Maxton RPC-Y7R-U usb programming cord
uploaded the PL2303 Macosx v1.5.1 driver

see attached screen shot

Cheers

Lane