Your IpKall must be set to sip.future-nine.com. Please set it to either incoming.future-nine.com and set your ATA to that too - or set it to sip2.future-nine.com and your ATA to that too. Basically, they have to match.
Are you saying my IPKALL has to be set up to incoming.future-nine.com AND the ATA set up to incoming.future-nine.com for it to work? -- "People demand freedom of speech as a compensation for the freedom of thought which they seldom use."
reply to nitzan I setup sip.future-nine.com as proxy server on IPKall when I setup my account with them and never changed it, my ATA already was using sip.future-nine.com yet the incoming calls were trying to use sip2. I believe The change happens on your end when trying to load balance and force the users to use sip2 server. I never wanted to use nor set my proxy for sip2 due to it is 23 hops away from me verses sip is only 13 hops. I set them up last night on incoming.future-nine.com on both end and it is working after 15 hours.