I created a simple page with a gridview that has a button field. I also added a textbox/hemleditorextender. Buttons do not fire postback in IE 11. Seems ok in previous version of IE.
Comments: this sound like the issues I had first what framework do you use for 1. Ajax 2. IIS if you are using <4.5 I know that you will get this error on ie11 this is a Microsoft issues not Ajax I had the same issues I had to upgrade to .NET 4.5 but to do so I had to Upgrade my OS to windows server 2008 and get a new server so I could install it so because Microsoft made IE11 that was not compatible with .net3.5 (Microsoft) my Company had to Buy Windows server 2008 fun let force them to buy our software because there clients upgrade free software [look at this asp.net form about the error](http://forums.asp.net/t/1934887.aspx?Server+patch+for+ASP+NET+4+to+help+it+recognise+IE11)
Comments: this sound like the issues I had first what framework do you use for 1. Ajax 2. IIS if you are using <4.5 I know that you will get this error on ie11 this is a Microsoft issues not Ajax I had the same issues I had to upgrade to .NET 4.5 but to do so I had to Upgrade my OS to windows server 2008 and get a new server so I could install it so because Microsoft made IE11 that was not compatible with .net3.5 (Microsoft) my Company had to Buy Windows server 2008 fun let force them to buy our software because there clients upgrade free software [look at this asp.net form about the error](http://forums.asp.net/t/1934887.aspx?Server+patch+for+ASP+NET+4+to+help+it+recognise+IE11)