MISDN + 3cards + only one call possible

Hi,
I have a small problem with mISDN.
I have 3 hfc based card (cologne chip) with chan_misdn but I can’t receive or call more than one call at the same time !!! If I have more than one call the channel say that all is busy …

Someone could help me ? please THANKS !!!
:cry:

/etc/misdn-init.conf :

card=1,hfcpci,pcm_slave,dtmf
card=2,hfcpci,pcm_slave,dtmf
card=3,hfcpci,pcm_slave,dtmf
poll=128
dsp_options=0
debug=0

/etc/asterisk/misdn.conf :
bridging=no
stop_tone_after_first_digit=no
append_digits2exten=yes
l1_info_ok=yes
clear_l3=no
method=standard
dynamic_crypt=no

[defaut]
msns=*
context=ISDN_IN
language=en
te_choose_channel=no
dialplan=0
use_callingpres=yes
allways_immediate=yes
immediate=yes
hold_allowed=no
callgroup=0
pickupgroup=0
echocancelwhenbridged=no
echotraining=yes

[ISDN]
ports=1,2,3,4,5,6
; I have 3 cards with 2ports
context=ISDN_IN

/etc/asterisk/extensions.conf :
[ISDN_OUT]
exten => _0.,1,Dial(mISDN/g:ISDN/${EXTEN:1}/dHello)

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