FindControl Issues.

 This code is returning errors:
 
    protected void OnSelect(object sender, EventArgs e)
    {
        Control EntryTextBox = Page.FindControl("EntryLimitTextBox");
        EntryTextBox.Text = ((LinkButton)sender).Text;
    }
The "text" that is highlighted errors out.
The "EntryLimitTextBox" is inside a FormView control. I am having serious issues finding controls that are within other controls or containers.
 
Any help would be appreciated.

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