Help:Squid in bridge Mode

Hello..

I have a small probs with squid.I have installed FC3 (Full install), after this have configured squid in transparent mode and forwarded port 80 passing thru it to Squid port 3128,its configured in bridge mode. When i tested everything is working fine with max 2-3 systems..when i put the same into a bigger network having 200pc its stops forward packets to external...still squid was working (checked by pointing browser to squid even iptables to working fine). I can see traffic hitting on port 80 is been forwarded to squid (checked on access.log) but no one abling to browse..Can anyone help me out.

Regards
freebird

While i was looking into access.log...i found that the packet which is be hitting cache was not geting domain names to resolve/forwrd..any idea what it can be

"1171873869.092 4 LAN IP TCP_MISS/503 1524 GET www.linksmaster.com/images/m02-on.gif - NONE/- text/html"


Regards
freebird