FormsAuthentication.SetAuthCookie无法在IE9或Chrome中运行

Sorry if this has been covered, but I about to pull my hair out. My site is using forms authentication and works perfectly when I test on //localhost but when I publish to the web it does not work in IE9. I have followed all the steps outlined in tutorials but when using IE9 or Chrome FormsAuthentication.SetAuthCookie never creates the cookie. The kicker is when I use Firefox it works. Below is code from my web.config and my code behind in C#.Sorry if this has been covered, but I about to