Form refresh problem

Hello everybody,

I am facing a strange problem in my asp.net application. I have a listbox which contains group names etc. If I add a group by typing a group name in the textbox just below the listbox, it saves the group successfully in the database and updates the listbox. Then I browse the site and go on some other link. After that, when I came back on the group page, I could not find the group in the listbox that was added. The group will not be shown untill I close the browser and re-open it.

For filling listbox, I have one method called Fill and I tested the method, its working fine. Actually, the listbox is filled on Page_Load event. When I inserted a break point on Page_Load event, this event runs only once. This shows that Page_Load event is not running every time user comes on groups page. May be application is reading the page from the cache.

Would you please tell me how to resolve this issue ??

Thanks