Directing channels to cards

I am having problems adjusting LinVDR to work with a new DVB card. At the moment I have FF as DVB1 and capture Hotbird (TPS). Now I have added a second card to receive Astra 1. Everything works ok (!!) except the picture for C+nal is black. VDR signal information says that C+nal channels are encrpyted with Viaccess, I see a video date rate of the right size (not always Audio data rate). TPeS - which is Viaccess - decrypts without any problems. So does anyone know how I can tell VDR to run the encrypted signal from card 2 through the cam modules on card 1.
KingofSat indicates the C+nal is encrpyted with Seeca or mediagard, and not Viaccess. Does anyone know which one is correct?i
I suppose it might also be the same problem I'm having with the Free-To-Air channels from Astra. They arrive via card 2 and then are lost; because it seems VDR likes the Free-to-air channels to arrive at card 1. Does anyone know how, or where, I can tell VDR to accept free to air on card 2?
I have spent a long time without success trying to find out where VDR keeps information about which card can deal with which channel now that the ca.conf file is redundant.
Any help would be very welcome.
Thanks.

That's interesting. How do you use the "sourcecaps" patch? I',m using LinVDR and I have patched it up to version 1.3.37. Can you explain what does sourcecaps does?
I guess the problem is "how do I make sure vdr looks to the right card, and decryption process, for the selected channel. And also what system does C+nal use? Because if its not Viaccess then I need another cam module.
Thanks Franck.

I setup SourceCaps and entered the sources info into setup.conf and it all works perfectly. The clear channels from each satellite are all appearing correctly.
Many thanks for you help.