Thanks, was already trying to update the firmware using the CL command mentioned in the 3rd post.
This working flawlessly!

Guys, I'm having trouble updating the rflink firmware version to R44. I used the instructions in the startpost. But although I think everything should be OK, the program button is greyed out.. The logging window shows the following information: 20;00;Nodo RadioFrequencyLink V1.1; 10;version; 20;01 ...