Problem with FXS modules in A400P

Hello.
I'm using CentOS 6.3 (Kernel 2.6.32-279.22.1) Asterisk 1.8.20.0 and Dahdi 2.6.1.
I intastalled A400P with 2 FXS and 1 FXO modules. It seems that kernel can not calibrate FXSs/
Below is dahdi_scan output.


> dahdi_scan
[1]
active=yes
alarms=OK
description=Wildcard TDM400P REV E/F Board 5
name=WCTDM/4
manufacturer=Digium
devicetype=Wildcard TDM400P REV E/F
location=PCI Bus 03 Slot 06
basechan=1
totchans=4
irq=0
type=analog
port=1,FXS FAILED
port=2,FXO
port=3,FXS FAILED
port=4,none

Any clues how I can fix that?
I found link on solution of same problem in FAQ (Q20) but it seems out of date.
Thank you.

It's my fault - I forgot to power A400P.
Please close the topic.