Hi Steven,
If this is a pre-CME 8.5 config you may be hitting this restriction;
In Cisco Unified CME 8.5 and later versions, when call forward no answer (CFNA) command is configured in a voice hunt group, you are not required to set a timeout value for voice hunt group member and the call forward no answer timer is ignored.
#
In earlier version of Cisco Unified CME, if call forward no answer was configured for a voice hunt group member, you were required to set the value of timeout command. The timeout value was required to be less than the timeout value of the call-forward no answer command.
http://www.cisco.com/en/US/docs/voice_ip_comm/cucme/admin/configuration/guide/cmecover.html#wp1118926
http://www.cisco.com/en/US/docs/voice_ip_comm/cucme/admin/configuration/guide/cmecover.html#wp1154483
Cheers!
Rob
"And if I should fall behind
Wait for me" - Springsteen