[asterisk-ss7] chan_ss7 + dahdi

[caio]

Hi,
I can not load chan_ss7.so module from asterisk-1.4 with dahdi (instead of zaptel).
Chan_ss7-1.1 source code was compiled with DAHDI flag set and dahdi include path.

Here the error from asterisk console:

[Jul 10 18:07:47] ERROR[8026]: transport.c:180 openchannel: Unable to open /dev/zap/channel: No such file or directory.
[Jul 10 18:07:47] ERROR[8026]: chan_ss7.c:842 ss7_load_module: Unable to initialize ISUP.

I have these modules loaded:

# lsmod
Module                  Size  Used by
wcte11xp               26400  0 
dahdi_dummy             7752  0 
dahdi                 188752  2 wcte11xp,dahdi_dummy

and these devices were created:

# ls -l /dev/dahdi/
total 0
crw-rw---- 1 asterisk dialout 196,   1 Jul 10 17:36 1
...
crw-rw---- 1 asterisk dialout 196,  31 Jul 10 17:36 31
crw-rw---- 1 asterisk dialout 196, 254 Jul 10 17:32 channel
crw-rw---- 1 asterisk dialout 196,   0 Jul 10 17:32 ctl
crw-rw---- 1 asterisk dialout 196, 255 Jul 10 17:32 pseudo
crw-rw---- 1 asterisk dialout 196, 253 Jul 10 17:32 timer


How can i resolve this problem?
Thanks,

Claudio