I don't know what that model looks like, but I suspect it has a hopper above the fire box???
If you have a picture or link to one, it would be helpfull. There are a lot of folks here that probably still use one so maybe they'll chime in. I have a Vigilant hopper fed stove so the operation is probably similiar.
Do yo fill the hopper after a good strong coal bed is established?
Can you describe the chimney, hieght ect?
When it's been running for an hour or so, how hot is the pipe at the chimney connection? and can you put a magnetic thermometer on the stove top?
When you say it goes out, are you saying the fire dies and there is a lot of black unburned coal left, OR is most of the coal burned up with ashes at the bottom of the fore bed and grey unburned coal at the top????
A lot of problems are caused by too little draft or to much draft from the chimney and a barometric stove pipe damper solves the high draft problems.
So post some more information, and I'm sure you'll get the advice here to get her hummin' along nicely.
I remember a friend used to burn a Franco Belge in the early 80's (he's dead now) but it burned nice and steady, pumping out massive heat.
After posting this I searched this site and came up with these threads: Franco Belge: Can't get coal lit/draft problems
and Franco Belge Coal Stove -Won't stay lit!