thank's Jon,

I have try with Makehex v2.0 and this parameter:
"
Device=16 & 14 & 20
Function=0..63

Protocol=RC5
Frequency=36000
Time Base=889 '888.89 = 32 cycles at 36Khz
Message Time=113778 '128 times TimeBase of 888.89
Zero=1,-1
One=-1,1
Prefix=1,-1,1 'Officially -1,1,-1,1 but starting with off is silly
First Bit=MSB
Form=;*,T:1,D:5,F:6
"

and the codes that Makehex gives, doesn't work!
Do you have an idea on parameterizes them to give?

David