We are using an Axiom USB debugger which doesn't connect to the V4 processor on our board. These boards have never been able to connect. They look like they start with an SD clock and a CS0 access of 8 selects, so it looks like it wants to work. The debugger can connect to the Freescale MDF54455 development system we have. As far as I can tell, we have the same connections on the processor as the development system.
Please see the attached partial schematic for the processor.