VOD with DVB-T

[muse]

Hi all,
i'm using this command with vlm/telnet to stream a dvb-t channel on demand:

new LA7 vod enabled
setup LA7 input dvb/ts:adapter=1:frequency=786000000:inversion=0:bandwidth=8:code-rate-hp=2:code-rate-lp=0:modulation=64:transmission=8:guard=32:budget-mode=1
setup LA7 option ":program=20"

It works fine when a start to play the stream from one pc.. but if i try to play the stream from a second pc, vlc on the server shows this error:

[00000463] [Media: LA7] dvb access error: FrontEndOpen: opening device failed (Dispositivo o risorsa occupata)
[00000463] [Media: LA7] vcdx access warning: Can't get file status for adapter=1:frequency=786000000:inversion=0:bandwidth=8:code-rate-hp=2:code-rate-lp=0:modulation=64:transmission=8:guard=32:budget-mode=1:
Nessun file o directory
[00000463] [Media: LA7] access_file access warning: adapter=1:frequency=786000000:inversion=0:bandwidth=8:code-rate-hp=2:code-rate-lp=0:modulation=64:transmission=8:guard=32:budget-mode=1: Nessun file o directory
[00000463] [Media: LA7] cdda access warning: could not open adapter=1:frequency=786000000:inversion=0:bandwidth=8:code-rate-hp=2:code-rate-lp=0:modulation=64:transmission=8:guard=32:budget-mode=1
[00000463] [Media: LA7] main access warning: no access2 module matching "dvb" could be loaded
[00000460] [Media: LA7] main input error: no suitable access module for `dvb/ts:adapter=1:frequency=786000000:inversion=0:bandwidth=8:code-rate-hp=2:code-rate-lp=0:modulation=64:transmission=8:guard=32:budget-mode=1'
[00000467] [Media: LA7] dvb access error: FrontEndOpen: opening device failed (Dispositivo o risorsa occupata)
[00000467] [Media: LA7] vcdx access warning: Can't get file status for adapter=1:frequency=786000000:inversion=0:bandwidth=8:code-rate-hp=2:code-rate-lp=0:modulation=64:transmission=8:guard=32:budget-mode=1:
Nessun file o directory
[00000467] [Media: LA7] access_file access warning: adapter=1:frequency=786000000:inversion=0:bandwidth=8:code-rate-hp=2:code-rate-lp=0:modulation=64:transmission=8:guard=32:budget-mode=1: Nessun file o directory
[00000467] [Media: LA7] cdda access warning: could not open adapter=1:frequency=786000000:inversion=0:bandwidth=8:code-rate-hp=2:code-rate-lp=0:modulation=64:transmission=8:guard=32:budget-mode=1
[00000467] [Media: LA7] main access warning: no access2 module matching "dvb" could be loaded
[00000464] [Media: LA7] main input error: no suitable access module for `dvb/ts:adapter=1:frequency=786000000:inversion=0:bandwidth=8:code-rate-hp=2:code-rate-lp=0:modulation=64:transmission=8:guard=32:budget-mode=1'

Any suggestions ?
Thanks.