[HELP] problem with zap channels

I have recently installed my server and all worked well until I included my ISDN card. Drivers are well installed but when I load the channel by service zaptel start, an error message comes :

Aug  7 09:22:12 asterisk1 kernel: qozap: activating layer 1, span 0
Aug  7 09:22:12 asterisk1 kernel: qozap: activating layer 1, span 1
Aug  7 09:22:12 asterisk1 kernel: qozap: activating layer 1, span 3
Aug  7 09:22:12 asterisk1 kernel: qozap: activating layer 1, span 2
Aug  7 09:22:16 asterisk1 kernel: qozap: t3 timer expired for span 0
Aug  7 09:22:16 asterisk1 kernel: Zaptel: Master changed to ztqoz/2/2
Aug  7 09:22:16 asterisk1 kernel: qozap: t3 timer expired for span 1
Aug  7 09:22:16 asterisk1 kernel: Zaptel: Master changed to ztqoz/2/3
Aug  7 09:22:16 asterisk1 kernel: qozap: t3 timer expired for span 2
Aug  7 09:22:16 asterisk1 kernel: Zaptel: Master changed to ztqoz/2/4
Aug  7 09:22:16 asterisk1 kernel: qozap: t3 timer expired for span 3
Aug  7 09:22:16 asterisk1 kernel: qozap: not re-activating layer1 span 0
Aug  7 09:22:16 asterisk1 kernel: qozap: not re-activating layer1 span 1
Aug  7 09:22:16 asterisk1 kernel: qozap: not re-activating layer1 span 2
Aug  7 09:22:16 asterisk1 kernel: qozap: not re-activating layer1 span 3
Aug  7 09:22:16 asterisk1 kernel: qozap: clearing alarms on span 0
Aug  7 09:22:16 asterisk1 kernel: Zaptel: Master changed to ztqoz/2/1
Aug  7 09:22:16 asterisk1 kernel: qozap: clearing alarms on span 1
Aug  7 09:22:16 asterisk1 kernel: qozap: clearing alarms on span 2
Aug  7 09:22:16 asterisk1 kernel: qozap: clearing alarms on span 3

and I can’t phone though my ISDN card (the dels of the card light red).

Does anyone know why I have this error ?

Thank in advance.