SIP Registration w/ CBeyond SIP Trunks

Hi:

We have been running Asterisk 1.4 w/ CBeyond SIP trunks for ~ 1 year. Recently we upgraded to Asterisk 1.6 and now we have problems (calls rejected because of no matching extension found) with incoming calls from CBeyond. Below are SIP traces from the old and new systems. It seems that with the new system Asterisk is not placing the call into the correct context in extensions.conf. cbeyond-in is the context in extensions.conf where the CBeyond calls should land. The relevant portion of our sip.conf is also listed below.

Any help would be appreciated.

Thanks,
Mark

SIP debug from the Asterisk 1.6 (this fails w/ call rejected)

Sending to 11.1.111.1 : 5060 (no NAT)
Using INVITE request as basis request - BW174654356100510-834871750@bwas1-vir.atl0.cbeyond.net
No matching peer for ‘9191234567’ from '11.1.111.1:5060’
Found RTP audio format 0
Found RTP audio format 100
Found audio description format X-NSE for ID 100
Capabilities: us - 0x18000e (gsm|ulaw|alaw|h263|h263p), peer - audio=0x4 (ulaw)/video=0x0 (nothing)/text=0x0 (nothing), combined - 0x4 (ulaw)
Non-codec capabilities (dtmf): us - 0x1 (telephone-event), peer - 0x0 (nothing), combined - 0x0 (nothing)
Peer audio RTP is at port 192.168.21.31:23210
Peer doesn’t provide video
Looking for 7701234567 in default (domain 22.22.222.222)

SIP debug from (old) Asterisk 1.4 (this works)

Sending to 11.1.111.1 : 5060 (no NAT)
Using INVITE request as basis request - BW191102572100510-278039353@bwas1-vir.atl0.cbeyond.net
Found peer 'cbeyond’
Found RTP audio format 0
Found RTP audio format 100
Peer audio RTP is at port 192.168.21.31:20284
Found unknown media description format X-NSE for ID 100
Capabilities: us - 0x4 (ulaw), peer - audio=0x4 (ulaw)/video=0x0 (nothing), combined - 0x4 (ulaw)
Non-codec capabilities (dtmf): us - 0x1 (telephone-event), peer - 0x0 (nothing), combined - 0x0 (nothing)
Peer audio RTP is at port 192.168.21.31:20284
Looking for 7701234567 in cbeyond-in (domain 22.22.222.222)

portion of sip.conf

register => 7701234567:XYZXYZXYZ@cbeyond/7701234567

[cbeyond]
host=sipconnect.atl0.cbeyond.net
fromdomain=sipconnect.atl0.cbeyond.net
outboundproxy=sip-proxy.atl0.cbeyond.net
qualify=yes
context=cbeyond-in
disallow=all
allow=ulaw
canreinvite=no
dtmfmode=auto
insecure=very
nat=never
secret=XYZXYZXYZ
type=peer
username=7701234567