[tproxy] yahoo and hotmail never open

hi all, i am getting a problem with tproxy when i run a normal website it's working fine but when i login in yahoo or hotmail, sedond page never  open and it's says following error's message Zero Sized Reply, server is too busy, timeout and when i run with normal tansparent proxy like redirect rule it's work fine, i am giving my setup below. rhel 5 with kernel 2.6.28.2 with patch of julian's routing patch (http://www.ssi.bg/~ja/) iptables-1.4.3rc1 squid-2.6.18 with tproxy patch of tproxy version2 and also check squid-3.1.0.4 with tproxy version4 i am using a server with 4 outgoing connection for internet and 1 internal connection for local network. please help me thanks in advance sonu...