lost conection/restransmit

[Tiresias]

Hi

i have a strange issue with some tcp clients.
some time connection is closed on client (error code 10053 or 10054)

i sniffed traffic (on server) and saw something i dont understand (just before conection is seen closed on client)

23:19:01.183080 IP IP_client > IP_server.23: P 1794:2010(216) ack 173963 win 32568
23:19:01.187014 IP IP_server.23 > IP_client: P 173963:174674(711) ack 2010 win 65078
23:19:01.340701 IP IP_client > IP_server.23: . ack 174674 win 32768
23:20:00.956563 IP IP_server.23 > IP_client: P 174674:175497(823) ack 2010 win 65078
23:20:01.586344 IP IP_server.23 > IP_client: P 174674:175497(823) ack 2010 win 65078
23:20:02.789461 IP IP_server.23 > IP_client: P 174674:175497(823) ack 2010 win 65078
23:20:05.195684 IP IP_server.23 > IP_client: P 174674:175497(823) ack 2010 win 65078
23:20:10.008100 IP IP_server.23 > IP_client: P 174674:175497(823) ack 2010 win 65078
23:20:19.632865 IP IP_server.23 > IP_client: P 174674:175558(884) ack 2010 win 65078

23:20:36.753527 IP IP_client.3109 > IP_Server.23: S 750357541:750357541(0) win 65535 <mss 1460,nop,wscale 2,nop,nop,sackOK>


in fact the message client stop replying to the server push, and reopen a connection a mn later, but we dont receive any close (F or R).