Interfacing an RL70crc plus to AC400

[scsullivan]

Chuck,

An additional question on this same subject. I just installed an EV1/ACU400/p70s along with a new RS150 and used a ST1 to STng convertor for my legacy instruments. I have an RC70c plus radar and chart plotter. My problem - I am unable to get navigation data (Track - Go to Waypoint) from the RC70 to the autopilot/p70s control head. Any idea of where I should be looking for issues? The software version on the p70s is 3.07 and on the Evolution it's 2.17. If it's software, How do I get this installed given the older MFD? Thanks.