[Serusers] click-to-dial on 7905 work not every time

Hi! Sorry for my English. What's the problem? click-to-dial on Cisco 7905 work not every time (1/3) Say: 405 Method Not Allowed Run: [root@sip root]# ctd.sh "sip:5089715@cint.ru" "sip:8644111@cint.ru" Incorrect: [root@sip root]# ngrep "CSeq:.*REFER" -L port 5060 interface: eth0 (195.234.147.64/255.255.255.248) filter: ip and ( port 5060 ) match: CSeq:.*REFER ##### U 195.234.147.65:5060 -> 212.15.104.225:1461 REFER sip:5089715@212.15.104.225:1461;user=phone;transport=udp SIP/2.0. Max-Forwards: 10. Record-Route: <sip:5089715@195.234.147.65;ftag=10957609979949;lr=on>. Via: SIP/2.0/UDP 195.234.147.65;branch=z9hG4bK0669.17f76256.0. Via: SIP/2.0/UDP 195.234.147.65;branch=z9hG4bK0669.07f76256.0. To: <sip:5089715@cint.ru>;tag=4224398002. From: <sip:1111111@cint.ru>;tag=10957609979949. CSeq: 2 REFER. Call-ID: 10957609979949.fifouacctd. Content-Length: 0. User-Agent: Sip EXpress router(0.8.14 (i386/linux)). Contact: <sip:caller@195.234.147.65:5060>. Referred-By: <sip:1111111@cint.ru>. Refer-To: sip:8644111@cint.ru. P-hint: outbound. . ## U 212.15.104.225:1461 -> 195.234.147.65:5060 SIP/2.0 405 Method Not Allowed. Via: SIP/2.0/UDP 195.234.147.65;branch=z9hG4bK0669.17f76256.0. Via: SIP/2.0/UDP 195.234.147.65;branch=z9hG4bK0669.07f76256.0. From: <sip:1111111@cint.ru>;tag=10957609979949. To: <sip:5089715@cint.ru>;tag=4224398002. Call-ID: 10957609979949.fifouacctd. CSeq: 2 REFER. Server: Cisco-CP7905/1.01-030807A. Allow: ACK, BYE, CANCEL, INVITE, NOTIFY, OPTIONS, REFER, REGISTER. Content-Length: 0. . Correct: [root@sip root]# ngrep "CSeq:.*REFER" -L port 5060 interface: eth0 (195.234.147.64/255.255.255.248) filter: ip and ( port 5060 ) match: CSeq:.*REFER ########## U 195.234.147.65:5060 -> 212.15.104.225:1461 REFER sip:5089715@212.15.104.225:1461;user=phone;transport=udp SIP/2.0. Max-Forwards: 10. Record-Route: <sip:5089715@195.234.147.65;ftag=109576106810064;lr=on>. Via: SIP/2.0/UDP 195.234.147.65;branch=z9hG4bKd9af.f745fd13.0. Via: SIP/2.0/UDP 195.234.147.65;branch=z9hG4bKd9af.e745fd13.0. To: <sip:5089715@cint.ru>;tag=4224398002. From: <sip:1111111@cint.ru>;tag=109576106810064. CSeq: 2 REFER. Call-ID: 109576106810064.fifouacctd. Content-Length: 0. User-Agent: Sip EXpress router(0.8.14 (i386/linux)). Contact: <sip:caller@195.234.147.65:5060>. Referred-By: <sip:1111111@cint.ru>. Refer-To: sip:8644111@cint.ru. P-hint: outbound. . # U 212.15.104.225:1461 -> 195.234.147.65:5060 SIP/2.0 202 Accepted. Via: SIP/2.0/UDP 195.234.147.65;branch=z9hG4bKd9af.f745fd13.0. Via: SIP/2.0/UDP 195.234.147.65;branch=z9hG4bKd9af.e745fd13.0. From: <sip:1111111@cint.ru>;tag=109576106810064. To: <sip:5089715@cint.ru>;tag=4224398002. Call-ID: 109576106810064.fifouacctd. CSeq: 2 REFER. Server: Cisco-CP7905/1.01-030807A. Allow: ACK, BYE, CANCEL, INVITE, NOTIFY, OPTIONS, REFER, REGISTER. Content-Length: 0. . ##################exit 29 received, 0 dropped