[cisco-voip] Call Back failure

[Yunming Song]

Dear Group,

I install CCM 3.3(4) with Service Release 2, and Unity 4.0(4),
all features are working except Call Back. When I push the
"CallBack" softbutton, the result is "Service is not Active".

I followed exact setup procedures for Call Back:
http://www.cisco.com/univercd/cc/td/doc/product/voice/c_callmg/3_3/sys_ad/3_3_4/ccmfeat/fscallbk.htm
and checked around the FAQ:
http://www.cisco.com/en/US/products/sw/voicesw/ps556/products_qanda_item09186a0080191057.shtml

actually "CTI Manager service" and "Extended Functions services" have been 
activated.
I have no idea why Call Back is still not working, is there any tricky point 
or missing point?

thanks in advance,
Yunming Song
Digicon Corporation
571-323-5030