Thank you so much. I think I have to change the receiver since it doesn't allow me to change the pids. I have managed to see the Esc1 and 2 channels with an Apbox s2 with the modified firewall.
I have to admit, it's a bit tricky! I have managed to watch these channels in an enigma 2 receiver (GB Trio 4k), following the tips in this topic. However, as I said before, not all channels. I have edited the lamedb file, coping the parameters line (p.) of each channel both from EnoSat's info above, and from the Ciefp settings (not the latest, because he already removed the 27.5W entry), and yes, the most part is working.
I also tried with a very simple Amiko 8150 that I had in my attic, but without success. I scanned all the channels, and the biss key is there, but no way to make it work. Although in this box there is a specific menu entry called "Biss B BC", which I believe is what is causing the problem. I will try with older some other older receiver in the weekend if I have time.
Like your's Apebox, this receiver does not allow me to edit the pids. However, as our dear Barney115 has stated, you only need to edit pids parameters in Enigma2 devices.