[asterisk-r2] problema con actualizacion a dahdi 2.6 y E1 sin funcionar

[r0d0]

buenos dias a todos tuve un problema [3] despues de actualizar a la 
version current de dahdi, he probado algunas posibles configuraciones 
encontradas gogleando pero sigue sinfuncionar, alguna idea de cual es la 
config correcta?? la configuracion anterior era [4] y trabajaba 
perfectamente.

gracias de antemano

[1]
# Autogenerated by /usr/sbin/dahdi_genconf on Wed Feb 15 12:00:18 2012
# If you edit this file and execute /usr/sbin/dahdi_genconf again,
# your manual changes will be LOST.
# Dahdi Configuration File
#
# This file is parsed by the Dahdi Configurator, dahdi_cfg
#
# Span 1: TE2/0/1 "T2XXP (PCI) Card 0 Span 1" (MASTER)
span=1,0,0,cas,hdb3
cas=1-15,17-31:1101
#dchan=16
echocanceller=oslec,1-15,17-31



# Span 2: TE2/0/2 "T2XXP (PCI) Card 0 Span 2"
#span=2,2,0,ccs,hdb3,crc4
# termtype: te
#bchan=32-46,48-62
#dchan=47

# Global data

loadzone        = us
defaultzone     = us

[2]
service dahdi restart
Unloading DAHDI hardware modules: ERROR: Module wct4xxp is in use
ERROR: Module dahdi is in use by wct4xxp
error
Loading DAHDI hardware modules:
   wct4xxp:                                                 [  OK  ]

Running dahdi_cfg:  DAHDI_ATTACH_ECHOCAN failed on channel 1: Invalid 
argument (22)
                                                            [FAILED]
[3]
  dahdi_cfg -vvv
DAHDI Tools Version - 2.6.0

DAHDI Version: 2.6.0
Echo Canceller(s): HWEC
Configuration
======================

SPAN 1: CAS/HDB3 Build-out: 0 db (CSU)/0-133 feet (DSX-1)

Channel map:

Channel 01: CAS / User (Default) (Echo Canceler: oslec) (Slaves: 01)
Channel 02: CAS / User (Default) (Echo Canceler: oslec) (Slaves: 02)
Channel 03: CAS / User (Default) (Echo Canceler: oslec) (Slaves: 03)
Channel 04: CAS / User (Default) (Echo Canceler: oslec) (Slaves: 04)
Channel 05: CAS / User (Default) (Echo Canceler: oslec) (Slaves: 05)
Channel 06: CAS / User (Default) (Echo Canceler: oslec) (Slaves: 06)
Channel 07: CAS / User (Default) (Echo Canceler: oslec) (Slaves: 07)
Channel 08: CAS / User (Default) (Echo Canceler: oslec) (Slaves: 08)
Channel 09: CAS / User (Default) (Echo Canceler: oslec) (Slaves: 09)
Channel 10: CAS / User (Default) (Echo Canceler: oslec) (Slaves: 10)
Channel 11: CAS / User (Default) (Echo Canceler: oslec) (Slaves: 11)
Channel 12: CAS / User (Default) (Echo Canceler: oslec) (Slaves: 12)
Channel 13: CAS / User (Default) (Echo Canceler: oslec) (Slaves: 13)
Channel 14: CAS / User (Default) (Echo Canceler: oslec) (Slaves: 14)
Channel 15: CAS / User (Default) (Echo Canceler: oslec) (Slaves: 15)
Channel 17: CAS / User (Default) (Echo Canceler: oslec) (Slaves: 17)
Channel 18: CAS / User (Default) (Echo Canceler: oslec) (Slaves: 18)
Channel 19: CAS / User (Default) (Echo Canceler: oslec) (Slaves: 19)
Channel 20: CAS / User (Default) (Echo Canceler: oslec) (Slaves: 20)
Channel 21: CAS / User (Default) (Echo Canceler: oslec) (Slaves: 21)
Channel 22: CAS / User (Default) (Echo Canceler: oslec) (Slaves: 22)
Channel 23: CAS / User (Default) (Echo Canceler: oslec) (Slaves: 23)
Channel 24: CAS / User (Default) (Echo Canceler: oslec) (Slaves: 24)
Channel 25: CAS / User (Default) (Echo Canceler: oslec) (Slaves: 25)
Channel 26: CAS / User (Default) (Echo Canceler: oslec) (Slaves: 26)
Channel 27: CAS / User (Default) (Echo Canceler: oslec) (Slaves: 27)
Channel 28: CAS / User (Default) (Echo Canceler: oslec) (Slaves: 28)
Channel 29: CAS / User (Default) (Echo Canceler: oslec) (Slaves: 29)
Channel 30: CAS / User (Default) (Echo Canceler: oslec) (Slaves: 30)
Channel 31: CAS / User (Default) (Echo Canceler: oslec) (Slaves: 31)

30 channels to configure.

Setting echocan for channel 1 to oslec
DAHDI_ATTACH_ECHOCAN failed on channel 1: Invalid argument (22)
~
[4]
# Global data
#***********************************
#Span1
span=1,0,0,cas,hdb3
cas=1-15:1101
dchan=16
cas=17-31:1101
echocanceller=oslec,1-15,17-31
-- 
Talk is cheap, show me the code!!!