Yo tengo exactamente ese problema....
[root@jorju src]# /usr/local/fop2/autoconfig-users-freepbx.sh
group=All Buttons:SIP/113,SIP/123,ZAP/7,SIP/SIM1,SIP/125,SIP/103,SIP/126,SIP/127,SIP/128,SIP/102,SIP/129,PARK/default,SIP/130,ZAP/1,SIP/131,ZAP/5,SIP/132,ZAP/4,SIP/4987713,SIP/124,SIP/122,SIP/114,SIP/111,SIP/115,SIP/116,ZAP/6,SIP/112,SIP/110,SIP/118,SIP/117,SIP/108,ZAP/11,ZAP/8,SIP/119,SIP/105,SIP/120,SIP/104,SIP/121,SIP/134,SIP/4987718,SIP/232,SIP/302,SIP/226,QUEUE/999,SIP/224,ZAP/12,SIP/223,SIP/109,ZAP/3,SIP/234,SIP/SIM2,SIP/4987717,SIP/301,SIP/4987716,SIP/237,SIP/4987715,SIP/236,SIP/4987714,SIP/211,SIP/156,SIP/137,SIP/152,SIP/138,SIP/100,SIP/151,SIP/Secretaria Gerencia,SIP/136,SIP/4987711,SIP/154,SIP/101,SIP/155,SIP/135,ZAP/2,SIP/4987712
group=All Extensions:SIP/109,SIP/118,SIP/111,SIP/302,SIP/100,SIP/108,SIP/102,SIP/101,SIP/103,SIP/104,SIP/105,SIP/Secretaria Gerencia,SIP/110,SIP/135,SIP/151,SIP/138,SIP/137,SIP/136,SIP/152,SIP/134,SIP/132,SIP/131,SIP/130,SIP/154,SIP/155,SIP/301,SIP/237,SIP/236,SIP/234,SIP/232,SIP/226,SIP/224,SIP/223,SIP/156,SIP/129,SIP/128,SIP/127,SIP/119,SIP/117,SIP/116,SIP/115,SIP/121,SIP/114,SIP/120,SIP/122,SIP/124,SIP/211,SIP/123,SIP/113,SIP/126,SIP/112,SIP/125
group=All Queues:QUEUE/999
group=All Trunks:ZAP/12,SIP/4987714,SIP/4987715,SIP/4987716,SIP/4987718,SIP/4987717,ZAP/8,ZAP/5,SIP/4987713,ZAP/7,ZAP/4,SIP/4987712,SIP/SIM2,ZAP/11,ZAP/6,SIP/4987711,ZAP/2,SIP/SIM1,ZAP/3,ZAP/1
user=302:302:all:All Trunks,All Conferences,All Extensions,All Buttons
buttonfile=autobuttons.cfg
pero si pongo user y pass correcto, sucede lo que indique....