C# oncheckedchanged event handler of aspcheckbox does not fire when checkbox is unc
<p>Hey could you look at this code: I get this error:</p>

<blockquote>
  <p>Object reference not set to an instance of an object.  Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.   Exception Details: System.NullReferenceException: Object reference not set to an instance of an object.  </p>
</blockquote>

<p>Source Error: </p>

<pre><code>{
    CheckBox chkBox1 = (CheckBox)e.Row.Cells[8].FindControl("chkStatus"); 
    chkBox1.CheckedChanged += new EventHandler(chkStatus_OnCheckedChanged); 
    chkBox1.Checked = true; 
    chkBox1.AutoPostBack = true;
}
</code></pre>
