Problem dialing via PSTN "Dahdi"

Hi. I have a PBX running asterisk-1.4.x and other running asterisk-1.8.x both pbx are OK. The pbx using asterisk-1.8.x i don’t know how to configure the channels to dial out via PSTN (TMD400P)
I have this in dahdi-channels.conf

[code]; Autogenerated by /usr/sbin/dahdi_genconf on Tue Nov 23 07:59:43 2010
; If you edit this file and execute /usr/sbin/dahdi_genconf again,
; your manual changes will be LOST.
; Dahdi Channels Configurations (chan_dahdi.conf)
; This is not intended to be a complete chan_dahdi.conf. Rather, it is intended
; to be #include-d by /etc/chan_dahdi.conf that will include the global settings

; Span 1: WCTDM/4 “Wildcard TDM400P REV E/F Board 5” (MASTER)
;;; line="3 WCTDM/4/2 FXSKS (In use) (SWEC: MG2)"
channel => 3

;;; line="4 WCTDM/4/3 FXOKS (In use) (SWEC: MG2)"
callerid=“Channel 4” <4004>
channel => 4

When i dial to PSTN the output is this:

  == Using SIP RTP CoS mark 5
    -- Executing [8095357273@phone-201:1] Dial("SIP/201-00000002", "dahdi/1/8095357273") in new stack
[Nov 23 08:23:26] WARNING[7285]: channel.c:5327 ast_request: No translator path exists for channel type dahdi (native 0x4c (ulaw|alaw|slin)) to 0x1 (g723)
[Nov 23 08:23:26] WARNING[7285]: app_dial.c:2030 dial_exec_full: Unable to create channel of type 'dahdi' (cause 58 - Bearer capability not available)
  == Everyone is busy/congested at this time (1:0/0/1)

How to configure it??? The dahdi detected the card because i saw when i execute dahdi_tools

do a dahdi show channels from the cli.

but I think you should be do a dahdi/3 .

That’s the output when “dahdi show channel 3” BUT LOOK, if i dial the FXS port “Dahdi/4” the dial is ok

dahdi*CLI> dahdi show channel 3 Channel: 3 File Descriptor: 12 Span: 1 Extension: Dialing: no Context: from-pstn Caller ID: Calling TON: 0 Caller ID subaddress: Caller ID name: Mailbox: none Destroy: 0 InAlarm: 1 Signalling Type: FXS Kewlstart Radio: 0 Owner: <None> Real: <None> Callwait: <None> Threeway: <None> Confno: -1 Propagated Conference: -1 Real in conference: 0 DSP: no Busy Detection: no TDD: no Relax DTMF: no Dialing/CallwaitCAS: 0/0 Default law: ulaw Fax Handled: no Pulse phone: no Gains (RX/TX): 0.00/0.00 Dynamic Range Compression (RX/TX): 0.00/0.00 DND: no Echo Cancellation: 128 taps currently OFF Wait for dialtone: 0ms Actual Confinfo: Num/0, Mode/0x0000 Actual Confmute: No Hookstate (FXS only): Onhook dahdi*CLI>