Old domotica system Lightec

[Frank V]

Hello, I'm new here.
A friend has bought a house with Lightec domotica system.
He's rebuild his house and ask me to expand his domotica system.
I bought some used Lightec modules.
I figured out that Lightec works with RC5 code (Philips)
I made a switch module and that works .
But I can't program the Lightec modules, with remote control (RC5)
I put the RC5 code on the data line and use commands 0-9 but it don't work.
Is here anybody who has some equipment from Lightec (infrared receiver IRTH1 from Lightec) or got a solution for the program problems

Thanks