I use IE6 on 98pc, it is unable to access or logon some secure pages when using proxy connection, error message: HTTP 400 - Bad Request Internet Explorer, and every thing works fine when using dialup connection. The problem happened on IE5, there was a yellow marker on advanced/security/warn about invalid site certificates/cookie when using proxy connection. If I choose disable all cookies, I can access or logon secure pages with proxy connection, but failed on some pages like yahoo mail which requires cookie. But I do need use proxy connection. There is no yellow marker under IE6. Can't figure out why, please help. Thanks.