GOautodial Open Source Omni-channel Contact Center Suite

Hi all,

I work with Goautodial 3.3. My problem is with dahdi, i can not change PERMANENTLY the owner and permission for all file in /dev/dahdi

In CLI, i got,
[Feb 10 11:57:50] WARNING¹⁰⁰⁴²: app_meetme.c:1248 build_conf: Unable to open DAHDI pseudo device

When i do : dahdi show status, i have:
No DAHDI found. Unable to open /dev/dahdi/ctl: Permission denied
Command 'dahdi show status' failed.

When i tried to change owner or permission in /dev/dahdi, it's works fine but if i restart dahdi or reboot my PC, i loose all change on this folder and my problem comes back

[root@go ~]# ls l /dev/dahdi/
total 0
crw------ 1 root root 196, 254 Feb 10 15:47 channel
crw------- 1 root root 196, 0 Feb 10 15:47 ctl
crw------- 1 root root 196, 255 Feb 10 15:47 pseudo
crw------- 1 root root 196, 253 Feb 10 15:47 timer
crw------- 1 root root 196, 250 Feb 10 15:47 transcode

Thanks for your help