5069 serial - Write problem, Read is OK

I am starting up a new RTU using a L306ER with a 5069 -serial to a Serial radio using DF1 Radio Modem Protocol. I only used it for reading to get the station set up and READS work fine. then I wanted to write... and no.
I was on the phone with Rockwell for 2 hours today and they couldn't make it work either.

I know there were a couple folks that tested this module when it got that firmware update that enabled DF1, but is anyone using it for real and had this work?

Equipment involved is a L81 processor, which is using an adjacent L61 processor as a serial port, then to the Radio pair and then to the RTU with the 5069-serial.

I have mapped the data table in the remote RTU and that mapping works for a read MSG but Writes result in a 16#001f extended _0204.

Anyone else seen this?

Oh and I use this same setup already with 3 ML1400's in RTUs and those work fine so the hardware is sound, the difference is the L306er and the serial module .

For those playing the home version of this game.. the Write MSG was created as "Connected" and that just wont work.
It's greyed out once the MSG is created you can't change it. You have to create a New MSG and not have that box checked. Must have fat fingered it.