ASPNET or IIS whatis the problem.....

Hello<br>I ve got some trouble with asp net web applications.For example say that simply:<br>I put a label and button to my interface using IDE. Then I double click the button and write code like that Label1.Text="blabla".Press F5.The interface is loaded.But <br>when I press the button which have to change label's text to blabla willnot work.The page's Url is loaded in the adress bar, but the Page cannot displayed of internet <br>explorer comes. In my opinion the "codebehind" part is not working. Is the problem with security of explorer or with the IIS configuration.<br>Thanks