Can't seem to get my new (to me) M1000 to respond to sysex paramter changes embedded in a MIDI track.

I do have the bank select sysex working perfectly, the bank unlock also.

The manual says it's F0 10 06 06 <parameter> <value>. No luck. For instance, F0 10 06 06 54 00 7F has no effect on Env 1 decay.

I'm an experienced sysex programmer, I have my Roland analog stuff obeying my every whim. Any suggestions

Thanks

Stublito