dclkrt and dclktx

Hey hey,
if a new master clock source is added using dclkrx, does a dclktx command have 
to be reissued to all other devices?

In my .midishrc I have a situation like this:
dnew 0 "dev1" rw
dnew 1 "dev2" rw
...
dxlktx [dlist]

...
proc add_ext_clk {
   dnew 6 "clocksource" ro
   dclkrx 6
}

The add_ext_clk procedure is called when the project is recorded into audio 
only, for practical reasons. I know the clock source to be quite stable, but 
one of my synth has problems adjusting to it. Testing it directly with other 
MIDI clock sources it locks perfectly to the tempo, so I can only assume that 
the external clocksource is not properly passed on to this hardware synth.

TIA and best wishes,

Jeanette

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