asterisk users - Jun 2012 - asterisk 10.4.2 realtime callgroup missing

I am using asterisk 10.4.2 and everything is working correctly except
callgroup is not working correctly. I have callgroup field in mysql but
if I run sip show peer XXXX on the asterisk cli I get the callgroup
field as blank all other fields correctly populated including
pickupgroup.

I'm not sure where to look to debug the realtime sip connection

Cheers
Stephen Collier