[asterisk-users] using dynamic DAHDI loop back

[Mehdi Shirazi]

Hi 
This is my system.conf :
dynamic=loc,1:0,31,0
bchan=1-15,17-31
dchan=16
echocanceller=mg2,1-15,17-31

dynamic=loc,1:1,31,0
bchan=32-46,48-62
dchan=47
echocanceller=mg2,32-46,48-62

and this is my chan_dahdi.conf:
group=0
echocancel = yes 
echocancelwhenbridged=no
context=from-pstn
switchtype = euroisdn
signalling = pri_net
channel => 1-15,17-31
group=1
switchtype = euroisdn
signalling = pri_cpe
channel => 32-46,48-62

all dahdi command line outputs like dahdi_tool are ok but inside Asterisk  there is 
nothing in "Dahdi show channels" .
please help me

Regards