Polycom stopped working after 7.5 upgrade

[silver_2000]

we recently went from 7,4 to 7.5 on a 48x and
since then the Polycom Duo speaker phone wont register with 48x

Ive updated the password and rebooting

I see this in the logs

Severity Date Time Event
Notice (5) 09/10/2015 06:44:21am tSip: Removing expired TCP client 192.168.2.110:5060 (socketDesc: 570

and this in diagnostics

seqNum[1] - 7:09/10/2015 12:07:12pm) tSip: SIP_CAPTURE: === RCVD TCP 192.168.2.110:33091 [563 bytes] ===
(seqNum[2] - 7:09/10/2015 12:07:12pm) tSip: SIP_CAPTURE: REGISTER sip:192.168.2.254;transport=tcp SIP/2.0
(seqNum[3] - 7:09/10/2015 12:07:12pm) tSip: SIP_CAPTURE: Via: SIP/2.0/TCP 192.168.2.110;branch=z9hG4bK38f4fb36495C2081
(seqNum[4] - 7:09/10/2015 12:07:12pm) tSip: SIP_CAPTURE: From: "GP Conf Polycom" <sip:5160@192.168.2.254>;tag=FBFB9BAC-2081167F
(seqNum[5] - 7:09/10/2015 12:07:12pm) tSip: SIP_CAPTURE: To: <sip:5160@192.168.2.254>
(seqNum[6] - 7:09/10/2015 12:07:12pm) tSip: SIP_CAPTURE: CSeq: 1 REGISTER
(seqNum[7] - 7:09/10/2015 12:07:12pm) tSip: SIP_CAPTURE: Call-ID: c913ed50-9c671bd3-a243a07a@192.168.2.110
(seqNum[8] - 7:09/10/2015 12:07:12pm) tSip: SIP_CAPTURE: Contact: <sip:5160@192.168.2.110;transport=tcp>;methods="INVITE, ACK, BYE, CANCEL, OPTIONS, INFO, MESSAGE, SUBSCRIBE, NOTIFY, PRACK, UPDATE, REFER"
(seqNum[9] - 7:09/10/2015 12:07:12pm) tSip: SIP_CAPTURE: User-Agent: PolycomSoundStation-SS_Duo-UA/4.1.0.84959
(seqNum[10] - 7:09/10/2015 12:07:12pm) tSip: SIP_CAPTURE: Accept-Language: en
(seqNum[11] - 7:09/10/2015 12:07:12pm) tSip: SIP_CAPTURE: Max-Forwards: 70
(seqNum[12] - 7:09/10/2015 12:07:12pm) tSip: SIP_CAPTURE: Expires: 3600
(seqNum[13] - 7:09/10/2015 12:07:12pm) tSip: SIP_CAPTURE: Content-Length: 0
(seqNum[14] - 7:09/10/2015 12:07:12pm) tSip: SIP_CAPTURE:
(seqNum[15] - 7:09/10/2015 12:07:12pm) tSip: SIP_CAPTURE: ===========================
(seqNum[16] - 7:09/10/2015 12:07:13pm) tSip: SIP_CAPTURE: === SENT TCP 192.168.2.110:5060 [401 bytes] ===
(seqNum[17] - 7:09/10/2015 12:07:13pm) tSip: SIP_CAPTURE: SIP/2.0 403 Forbidden
(seqNum[18] - 7:09/10/2015 12:07:13pm) tSip: SIP_CAPTURE: Via: SIP/2.0/TCP 192.168.2.110;branch=z9hG4bK38f4fb36495C2081
(seqNum[19] - 7:09/10/2015 12:07:13pm) tSip: SIP_CAPTURE: To: <sip:5160@192.168.2.254>;tag=35981-b8c0-be01
(seqNum[20] - 7:09/10/2015 12:07:13pm) tSip: SIP_CAPTURE: From: "GP Conf Polycom" <sip:5160@192.168.2.254>;tag=FBFB9BAC-2081167F
(seqNum[21] - 7:09/10/2015 12:07:13pm) tSip: SIP_CAPTURE: CSeq: 1 REGISTER
(seqNum[22] - 7:09/10/2015 12:07:13pm) tSip: SIP_CAPTURE: Call-ID: c913ed50-9c671bd3-a243a07a@192.168.2.110
(seqNum[23] - 7:09/10/2015 12:07:13pm) tSip: SIP_CAPTURE: Date: Thu, 10 Sep 2015 17:07:12 GMT
(seqNum[24] - 7:09/10/2015 12:07:13pm) tSip: SIP_CAPTURE: Contact: <sip:5160@192.168.2.254:5060>
(seqNum[25] - 7:09/10/2015 12:07:13pm) tSip: SIP_CAPTURE: Server: IST-OIS-7.5.19.1
(seqNum[26] - 7:09/10/2015 12:07:13pm) tSip: SIP_CAPTURE: Content-Length: 0
(seqNum[27] - 7:09/10/2015 12:07:13pm) tSip: SIP_CAPTURE:
(seqNum[28] - 7:09/10/2015 12:07:13pm) tSip: SIP_CAPTURE: ===========================

Can anyone here provide a hint ?