Web Chaining rule of ISA SERVER 2004

hi
there i have a problem with Web Chaining rule. i create a Rule there and give a route address and and the next option i allow all network or what ever i tried. when i enable this rule there i have some problem in the client. when i open www.orkut.com its opened www.google.com. some website is not working and some is don’t display any thing so if any one know about this rule so plz help me out thanks in Advance

Regards
waqar