At question about mplayer and dvb encrypted channels

Hello,

i have a little problem with my mplayer installation. Everything works 
fine, i can view all my unecrypted dvb-c channels (knc-on dvb-c card 
with alphacrypt light and premiere abo card). However my encrypted 
german premiere channel does not work.
If i start kaffeine, also the encrypted premiere channel works. When i 
close kaffeine and start mplayer with the last viewed channel in 
kaffeine, i can also see this channel.

Is it possible to change the channels.conf for encrypted channels ?

Whats wrong in my configuration ?

Thank you very much for your support.

Volker