Mac OS X 10.8.1 driver to program Wouxun KG-UV3D using Chirp

I am trying to program a Wouxun UV3D HT using Chirp software and my iMac, running on Mountain Lion (10.8.1). I've found a driver that loads fine on the iMac and is recognized by Chirp (/dev/cu.usbserial). This is the driver - md_PL2303_MacOSX10.6_dmg_v1.4.0. The problem is that when I attempt to download the Wouxun I get an error that a radio is not "responding." I'm using Wouxun's USB to radio cable.

What am I missing? Is there a secret Wouxun cloning mode? Any help would be greatly appreciated.

73,
David
KF4VCA