[Serusers] Windows Messenger 5.1

Windows Messenger 5.1 attempts to register but SER decides that its got a bad packet. Any idea what I'm doing wrong? if(uri == myself) { if(method == "REGISTER") { # Make sure they are a valid user on our proxy if(!www_authorize("bwsys.net", "sipfriends")) { # xlog("L_INFO", "Req Auth For %ct, URI = %ru"); www_challenge("bwsys.net", "1"); break; }; # xlog("L_INFO", "Registered Contact %ct, URI = %ru"); save("location"); break; }; }; U 12.221.249.222:2235 -> 198.88.216.84:5060 REGISTER sip:198.88.216.84 SIP/2.0..Via: SIP/2.0/UDP 172.25.25.100:13184..Max-Forwards: 70..From: <sip:MikeLaptop@198.88.216.84 <sip:MikeLaptop@198.88.216.84>..Call-ID: c2c09c85a7894f259e6be7cdf1 8ddc7c..CSeq: 1 REGISTER..Contact: <sip:172.25.25.100:13184>;methods="INVITE, MESSAGE, INFO, SUBSCRIBE, OPTIONS, BYE, CANCEL, N OTIFY, ACK, REFER, BENOTIFY"..User-Agent: RTC/1.3.5369 (Messenger 5.1.0639)..Event: registration..Allow-Events: presence..Conte nt-Length: 0.... # U 198.88.216.84:5060 -> 12.221.249.222:2235 SIP/2.0 401 Unauthorized..Via: SIP/2.0/UDP 172.25.25.100:13184;rport=2235;received=12.221.249.222..From: <sip:MikeLaptop@198.88 .216.84>;tag=bbad1c9410db4c55bc92b5f1ee653c1f;epid=0bde29f1fa..To: <sip:MikeLaptop@198.88.216.84>;tag=469318dd5d1a71e9927f4c3d0 4c855c1.3684..Call-ID: c2c09c85a7894f259e6be7cdf18ddc7c..CSeq: 1 REGISTER..WWW-Authenticate: Digest realm="bwsys.net", nonce="4 1c7137ddee9e9583c50f481de82ff43d682d7d2", qop="auth"..Server: Sip EXpress router (0.8.14 (i386/linux))..Content-Length: 0.... ############################################################################ ########### U 12.221.249.222:2236 -> 198.88.216.84:5060 REGISTER sip:198.88.216.84 SIP/2.0..Via: SIP/2.0/UDP 172.25.25.100:13184..Max-Forwards: 70..From: <sip:MikeLaptop@198.88.216.84 <sip:MikeLaptop@198.88.216.84>..Call-ID: 8c2c5a2c23b246c9acae80f1f0 f819f0..CSeq: 1 REGISTER..Contact: <sip:172.25.25.100:13184>;methods="INVITE, MESSAGE, INFO, SUBSCRIBE, OPTIONS, BYE, CANCEL, N OTIFY, ACK, REFER, BENOTIFY"..User-Agent: RTC/1.3.5369 (Messenger 5.1.0639)..Event: registration..Allow-Events: presence..Conte nt-Length: 0.... # U 198.88.216.84:5060 -> 12.221.249.222:2236 SIP/2.0 401 Unauthorized..Via: SIP/2.0/UDP 172.25.25.100:13184;rport=2236;received=12.221.249.222..From: <sip:MikeLaptop@198.88 .216.84>;tag=6fe4da518cec45079592bab51b24c9a6;epid=0bde29f1fa..To: <sip:MikeLaptop@198.88.216.84>;tag=469318dd5d1a71e9927f4c3d0 4c855c1.3684..Call-ID: 8c2c5a2c23b246c9acae80f1f0f819f0..CSeq: 1 REGISTER..WWW-Authenticate: Digest realm="bwsys.net", nonce="4 1c713a5f7cb83c6a875ededbbd8c05990dcfcfc", qop="auth"..Server: Sip EXpress router (0.8.14 (i386/linux))..Content-Length: 0.... # U 12.221.249.222:2236 -> 198.88.216.84:5060 REGISTER sip:198.88.216.84 SIP/2.0..Via: SIP/2.0/UDP 172.25.25.100:13184..Max-Forwards: 70..From: <sip:MikeLaptop@198.88.216.84 <sip:MikeLaptop@198.88.216.84>..Call-ID: 8c2c5a2c23b246c9acae80f1f0 f819f0..CSeq: 2 REGISTER..Contact: <sip:172.25.25.100:13184>;methods="INVITE, MESSAGE, INFO, SUBSCRIBE, OPTIONS, BYE, CANCEL, N OTIFY, ACK, REFER, BENOTIFY"..User-Agent: RTC/1.3.5369 (Messenger 5.1.0639)..Authorization: Digest username=&quot;MikeLaptop(a)198.8898.88. 216.84", realm="bwsys.net", qop=auth, algorithm=md5, uri="sip:198.88.216.84", nonce="41c713a5f7cb83c6a875ededbbd8c05990dcfcfc", nc=00000001, cnonce="34434462344244301731442301567622", response="bffa95785672e35e97197aded919c830"..Event: registration..Allo w-Events: presence..Content-Length: 0.... # U 198.88.216.84:5060 -> 12.221.249.222:2236 SIP/2.0 400 Bad Request..Via: SIP/2.0/UDP 172.25.25.100:13184;rport=2236;received=12.221.249.222..From: <sip:MikeLaptop@198.88. 216.84>;tag=6fe4da518cec45079592bab51b24c9a6;epid=0bde29f1fa..To: <sip:MikeLaptop@198.88.216.84>;tag=469318dd5d1a71e9927f4c3d04 c855c1.3684..Call-ID: 8c2c5a2c23b246c9acae80f1f0f819f0..CSeq: 2 REGISTER..Server: Sip EXpress router (0.8.14 (i386/linux))..Con tent-Length: 0.... ---------------------------------------- Michael Shuler, C.E.O. BitWise Communications, Inc. (CLEC) And BitWise Systems, Inc. (ISP) 682 High Point Lane East Peoria, IL 61611 Office: (217) 585-0357 Cell: (309) 657-6365 Fax: (309) 213-3500 E-Mail: mike(a)bwsys.net Customer Service: (877) 976-0711