[Zope] Zope and packet loss

Hi all, I use Zope as server (W2k) behind POUND proxy (little old linux RedHat 5.2). When I connect to our website from unreliable line with high packet loss (20%), pages and images served by Zope does not arrive or arrive not complette/broken. But from other servers this does not appears. It displays pages and images correctly. Note that from dialup line Zope serves all content OK. Does have somebody something similar? Regards JL.