[Asterisk-Users] hfc card unplug & plug not working?

[bman at host.sk]

Hello,

 I have hfc-pci card with zaphfc driver from bristuff.

card is working with asterisk, but when i unplug line cable from card,
and then plug back to card in log i can see only "could not create Zap
channel" when dialing.

when I remove zaphfc&zaptel drivers and then modprobe them card with
asterisk works again and stop working when line is unplugged (then 
plugged back).

is it normal?