History object.

Hi,

I have a weird problem. I have a website that I am working on, it has once specific page (which uses sessions objects and javascript) which when opened works fine. Then If I move elsewhere and come back to that page and refresh it two three times and if then I press back button on the browser takes me to previous page. But after that the back button is disabled for some reason while it shouldn't be. It is as if something is clearing the history in the code, but i checked all the code and nothing is doing on with history object except history.back() at some places where we have a button on the page that does the same thing as pressing the back button on the browser.

Any ideas?

Does the page contain any IFRAMEs? Any history.replace?

I searched the whole site, there were 0 occurences for IFRAMEs or History.Replace ... to narrow the problem, I noticed, when the page has large amount of data the problems is happening. If it has small amount of data it does not happen. Page uses lot of session variables if that has anything to do with it. It is a complicated page and uses HTML side server variables etc ..

Need more info... show code from the ASP.NET page, server side as well as rendered output on the page that has a disabled back button.