MPlayer DISEQC starnge behavior

Hi!

When I try to use MPlayer do watch dvb från to different LNB:s MPlayer
is unable to read frontend. If i do:

mybox ~ # szap -l UNIVERSAL "SVT1" - I get a lock
mybox ~ # szap -l UNIVERSAL "SVT2" - I get a lock

but if I do:
mybox ~ # mplayer "dvb://SVT1" 
dvb_streaming_start(PROG: SVT1, CARD: 1, VID: 0, AID: 0, TYPE: , FILE:
(null))
PROGRAM NUMBER 159: name=SVT1, freq=11881000
DVB_OPEN_DEVICES(3)
OPEN(0), file /dev/dvb/adapter0/demux0: FD=4, CNT=0
OPEN(1), file /dev/dvb/adapter0/demux0: FD=5, CNT=1
OPEN(2), file /dev/dvb/adapter0/demux0: FD=6, CNT=2
DVB_SET_CHANNEL: new channel name=SVT1, card: 0, channel 159
dvb_tune Freq: 11881000
TUNE_IT, fd_frontend 3, fd_sec 0
freq 11881000, srate 27500000, pol H, tone -1, specInv, diseqc 0,
fe_modulation_t modulation,fe_code_rate_t HP_CodeRate,
fe_transmit_mode_t TransmissionMode,fe_guard_interval_t guardInterval,
fe_bandwidth_t bandwidth
Using DVB card "Conexant CX24123/CX24109"
tuning DVB-S to Freq: 1281000, Pol: H Srate: 27500000, 22kHz: on, LNB:
0
DISEQC SETTING SUCCEDED
Getting frontend status
Not able to lock to the signal on the given frequency, timeout: 5

mybox ~ # mplayer "dvb://SVT2" - I get a lock

channels.conf
SVT1:11881:h:1:27500:5001:5002:5000
SVT2:12303:v:0:27799:512:640:3003

any ideas?

Thanks

/joakim