AudioCodes Stand Alone Survivability Configuration

I am trying to setup Stand Alone Survivability on AudioCodes gateway MP118.  Ih ave enabled the SAS feature but the ip phones are not able to register to the MP118... it returns a 500 Internal Server Error to the phone.   Does anyone have any suggestions on settings I need to set or check to get this to work?
I have basically enabled the SAS server and have the ports set to be 5080.... but thats all I have done.
The MP118 in currently registerd to the phone server and working.  The funny thing is when the phone initiates a call ( i have the phone using ip of the MP118 as the outbound proxy) through the MP118 it is successful and the phone is not registered to any proxy device...

Any help would be appreciated
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justinl525Asked:
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justinl525Author Commented:
got needed info from Audio Codes.  INstead of using the SAS feature of the MP118 soley I configured the Snom phones to have 2 identities and configured the 2nd one as the failover to the first one.  The 1st one registers with porxy and in the event of a failuer the 2nd identity registers to the MP118 and only makes outbound calls.
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