Unable to make calls within the extensions

sip.conf:

[general]
nat=force_rport,comedia
localnet=10.0.0.107/255.255.255.0
externip=54.86.12.19
bindaddr=0.0.0.0
bindport=5060
disallow=all
allow=gsm
allow=ilbc
allow=ulaw
allow=alaw
allow=g729
allow=h264
allow=g723
rtcachefriends=yes
qualify=3000
rtsavesysname=yes
rtupdate=yes
ignoreregexpire=yes
alwaysauthreject=yes
insecure=port,invite
srvlookup=yes
outboundproxy=10.0.0.122
directrtpsetup=no

[Kam-SBC]
type=friend
host=10.0.0.122
port=5060
disallow=all
allow=gsm
allow=ilbc
allow=ulaw
allow=alaw
allow=g729
allow=h264
allow=g723
context=cmp
canreinvite=no
insecure=invite,port
dtmfmode=rfc2833
nat=force_rport,comedia
qualify=yes
realm=10.0.0.122
directrtpsetup=no

extensions.conf:

[general]
static=yes
writeprotect=no

[globals]
[cmp]
switch => Realtime/@cmpextensions

extconfig.conf:

[settings]
sipusers => odbc,mydatabase,mysipusers
sippeers => odbc,mydatabase,mysipusers
sipregs => odbc,mydatabase,mysipregistrations
cmpextensions => odbc,mydatabase,mycallrulestable
voicemail => odbc,mydatabase,myvoicemail

/etc/odbcinst.ini :

[MySQL]
Description = MySQL driver
Driver = libmyodbc.so
Setup = libodbcmyS.so
CPTimeout =
CPReuse =
UsageCount = 1

/etc/odbc.ini:

[MySQL-asterisk]
Description = MySQL Asterisk database
Trace = Off
TraceFile = stderr
Driver = MySQL
SERVER = 10.0.0.253
USER = chandra
PASSWORD = test123456
PORT = 3336
DATABASE = mydatabase

/etc/asterisk/res_odbc.conf:

[mydatabase]
enabled => yes
dsn => MySQL-asterisk
username => chandra
password => test123456
pre-connect => yes