Bc2000 (for the BCF2000 & BCR2000)

Hi Folks.  I've got a JX-10 with the Colin Fraser rom in it.  The other 2 roms are 1.9.  Will these older roms inhibit sysex in any way?

And what magic trick am I missing to get learn mode to work between the jx 10 and the BCR20000?  I can get it to learn/see key presses on the JX as well as the c2 slider, but not any of the parameters with the alpha wheel.  Am I missing something?