xvtr api commands

I'm exploring the use of the xvtr api commands by running SmartSDR with the "Radio Setup" dialog open to the XVTR tab. I then connect to the radio from my own client and send it:

C123|xvtr create

That creates a new xvtr and I see a new blank xvtr appear on the Radio Setup dialog.

I receive a reply:

R123|0|1

Then I try to set the xvtr name by sending:

C124|xvtr set 00000001 name=512

I receive a reply:

R124|0|

but the name does not show up in the Radio Setup dialog.

I have been able to set the rf_freq but other fields don't seem to set when I send the appropriate command.

What am I doing wrong?

Thanks