Problem wtih tdm11b

having problem configuring tdm11b

after reboot can make one call, then device busy, no dt on fxs can’t dial from fxo
when doing zap restart seeing errors i.e device busy (see below) looking for any assistance in pointing me in the right direction to fix this problem.

the tdm400b (11b fxo/fxs) is working ok and has been operating in this system. moved from AsteriskNow to Fedora Core 8 with Asterisk

Asterisk 1.4.16.2

ztcfg -vvvv

Zaptel Version: 1.4.7.1
Echo Canceller: MG2
Configuration

Channel map:

Channel 01: FXO Kewlstart (Default) (Slaves: 01)
Channel 04: FXS Kewlstart (Default) (Slaves: 04)

2 channels to configure.

fedoraCLI> zap show status
Description Alarms IRQ bpviol CRC4
Wildcard TDM400P REV I Board 1 OK 0 0 0
fedora
CLI>
fedoraCLI>
fedora
CLI> zap restart
[Dec 28 16:56:58] WARNING[3454]: chan_zap.c:904 zt_open: Unable to specify channel 1: Device or resource busy
[Dec 28 16:56:58] ERROR[3454]: chan_zap.c:7186 mkintf: Unable to open channel 1: Device or resource busy
here = 0, tmp->channel = 1, channel = 1
[Dec 28 16:56:58] ERROR[3454]: chan_zap.c:10527 build_channels: Unable to register channel ‘1’
[Dec 28 16:56:58] WARNING[3454]: chan_zap.c:9824 zap_restart: Reload channels from zap config failed!
fedora*CLI>

problem was with installation of zaptel module.
installed both zaptel and asterisk again, as restarted asterisk and both fxo and fxs came online.