when I try to install sarge from business iso, I have an error because apt are not able to connect to. I have 602LAN suite installed as NAT between ethernet dhcp lan and TAP. I tried to load a preconfigured image of debian and i can ping to other pc near me and company http proxy server but apt with AQUIRE config for proxy  says 404 not found package.gz. I tried also to sniff with tcpdump on cygwin and I see that during apt-get update on colinux there was a delay that is when I launch apt-get update, I see the three-way-hand between my pc and company proxy after 2 or 3 seconds. apt-get seems don't wait the connection with proxy.

thanks in advances for help