websocket - Nginx 1.4.1 + Socket.io couldn't work. Handshake authorized but not working -

i using nginx 1.4.1 , trying configure work socket.io websockets. think have done correctly since see 'handshake authorized', after few seconds socket.io starts using xhr-polling, jsonp-polling , couldn't work.

my node.js express app runs on localhost:3002. , use nginx reverse proxy app. socket.io listening on same port.

i tried follow many guides in , elsewhere couldn't work. need experts. i've placed error log in here, not sure if help.

nginx.conf:

upstream instaneous {                 server 127.0.0.1:3002; }   server {                 listen 80;                 server_name instaneous.pin.gs;                 access_log logs/instaneous.access.log;                 error_log logs/instaneous.error.log;                  location / {         proxy_set_header x-real-ip $remote_addr;         proxy_set_header x-forwarded-for $proxy_add_x_forwarded_for;         proxy_set_header host $http_host;         proxy_set_header x-nginx-proxy true;          proxy_pass http://instaneous;         proxy_redirect off;          # enables ws support         proxy_http_version 1.1;         proxy_set_header upgrade $http_upgrade;         proxy_set_header connection "upgrade";                 }          } 

node.js socket.io log

   debug - client authorized    info  - handshake authorized z7cx6-3piustxileitk3    debug - setting request /socket.io/1/websocket/z7cx6-3piustxileitk3    debug - set heartbeat interval client z7cx6-3piustxileitk3    debug - client authorized    debug - websocket writing 1::    debug - setting request /socket.io/1/xhr-polling/z7cx6-3piustxileitk3?t=1373509382625    debug - setting poll timeout    debug - discarding transport    debug - cleared heartbeat interval client z7cx6-3piustxileitk3    debug - setting request /socket.io/1/jsonp-polling/z7cx6-3piustxileitk3?t=1373509392627&i=0    debug - setting poll timeout    debug - discarding transport    debug - clearing poll timeout    debug - clearing poll timeout    debug - jsonppolling writing io.j[0]("8::");    debug - set close timeout client z7cx6-3piustxileitk3    debug - jsonppolling closed due exceeded duration    debug - setting request /socket.io/1/jsonp-polling/z7cx6-3piustxileitk3?t=1373509412768&i=0    debug - setting poll timeout    debug - discarding transport    debug - cleared close timeout client z7cx6-3piustxileitk3    debug - jsonppolling received data packet 5:::{"name":"join","args":["abcdef"]} { '': [ 'z7cx6-3piustxileitk3' ],   '/abcdef': [ 'z7cx6-3piustxileitk3' ] }    debug - clearing poll timeout    debug - jsonppolling writing io.j[0]("8::");    debug - set close timeout client z7cx6-3piustxileitk3    debug - jsonppolling closed due exceeded duration    debug - client authorized    info  - handshake authorized blbss3qlgn54bthtitk4    debug - client authorized    info  - handshake authorized 6todyiysxiz_b19gitk5 

instaneous.error.log

2013/07/11 04:01:49 [error] 406#0: *1 upstream prematurely closed connection while reading response header upstream, client: 220.255.2.143, server: instaneous.pin.gs, request: "get /socket.io/1/xhr-polling/afh6as6ku3hm36qh49di?t=1373515290708 http/1.1", upstream: "http://127.0.0.1:3002/socket.io/1/xhr-polling/afh6as6ku3hm36qh49di?t=1373515290708", host: "instaneous.pin.gs", referrer: "http://instaneous.pin.gs/" 2013/07/11 04:01:49 [error] 406#0: *4 upstream prematurely closed connection while reading response header upstream, client: 220.255.2.163, server: instaneous.pin.gs, request: "get /socket.io/1/jsonp-polling/afh6as6ku3hm36qh49di?t=1373515300709&i=0 http/1.1", upstream: "http://127.0.0.1:3002/socket.io/1/jsonp-polling/afh6as6ku3hm36qh49di?t=1373515300709&i=0", host: "instaneous.pin.gs", referrer: "http://instaneous.pin.gs/" 2013/07/11 04:01:49 [error] 406#0: *1 connect() failed (111: connection refused) while connecting upstream, client: 220.255.2.143, server: instaneous.pin.gs, request: "post /socket.io/1/jsonp-polling/afh6as6ku3hm36qh49di?t=1373515309646&i=0 http/1.1", upstream: "http://127.0.0.1:3002/socket.io/1/jsonp-polling/afh6as6ku3hm36qh49di?t=1373515309646&i=0", host: "instaneous.pin.gs", referrer: "http://instaneous.pin.gs/" 2013/07/11 04:01:49 [error] 406#0: *1 connect() failed (111: connection refused) while connecting upstream, client: 220.255.2.143, server: instaneous.pin.gs, request: "get /socket.io/1/?t=1373515310157 http/1.1", upstream: "http://127.0.0.1:3002/socket.io/1/?t=1373515310157", host: "instaneous.pin.gs", referrer: "http://instaneous.pin.gs/" 2013/07/11 04:01:50 [error] 406#0: *1 connect() failed (111: connection refused) while connecting upstream, client: 220.255.2.143, server: instaneous.pin.gs, request: "get /socket.io/1/?t=1373515311158 http/1.1", upstream: "http://127.0.0.1:3002/socket.io/1/?t=1373515311158", host: "instaneous.pin.gs", referrer: "http://instaneous.pin.gs/"