[MPlayer-dvb] dvb-s does not work

[Marco]

it works when I run mplayer with:
mplayer -vo xvmc -vc ffmpeg12mc dvb://
the first line in channels.conf:
LUXE.TV SD:12551:v:0:22000:98:4451:3992
It does not work, when I change the first line to
arte:10743:h:0:22000:401:402:28724
this is my initial tuning file:
# Astra 19.2E SDT info service transponder
# freq pol sr fec
S 12551500 V 22000000 5/6

Do you know why?