[Serusers] re:Changing Sip Port

I still can't register with another port. This is what I am getting from ngrep. interface: \ (10.0.1.0/255.255.255.0) # # U 10.0.1.105:8080 -> 10.0.1.99:8080 REGISTER sip:10.0.1.99 SIP/2.0..Via: SIP/2.0/UDP 10.0.1.105:8080;rport;bran ch=z9hG4bKA2546AEF22FA4766A172D9533D938D55..From: Juan <sip:677403479814529 @10.0.1.99>;tag=2853267163..To: Juan <sip:677403479814529@10.0.1.99>..Conta ct: "Juan" <sip:677403479814529@10.0.1.105:8080>..Call-ID: 1BEBA6527D3A4797 93E960D259872D75@10.0.1.99..CSeq: 41059 REGISTER..Expires: 1800..Max-Forwar ds: 70..User-Agent: X-Lite release 1103m..Content-Length: 0.... # I 10.0.1.99 -> 10.0.1.105 3:3 ....E...}@.........i...c........REGISTER sip:10.0.1.99 SIP/2.0..Via: SIP/2. 0/UDP 10.0.1.105:8080;rport;branch=z9hG4bKA2546AEF22FA4766A172D9533D938D55. .From: Juan <sip:677403479814529@10.0.1.99>;tag=2853267163..To: Juan <sip:6 77403479814529(a)10.0.1.99 <mailto:77403479814529@10.0.1.99>..Contact> 8080>..Call-ID: 1BEBA6527D3A479793E960D259872D75@10.0.1.99..CSeq: 41059 REG ISTER..Expires: 1800..Max-Forwards: 70..User-Agent: X-Lite release 1103m..C ontent-Length: 0.... # U 10.0.1.105:8080 -> 10.0.1.99:8080 .. # I 10.0.1.99 -> 10.0.1.105 3:3 ....E...}B.........i...c.......... I don't know why SER (10.0.1.99) is not sending a 100 trying but instead is sending like the echo of the REGISTER request to 10.0.1.105 3:3 ? Can some one enlight me? THANKS Juan