Checkbox does does not work in VB.Net form
<p>I have two <code>checkboxes</code> for two <code>groupboxes</code> to enable visibility or invisibility of each one at a time but somehow one is working(<code>chboNew</code>) the other one(<code>chboIssue</code>) doesn't! 
here is the code I have written for it, any help would be appreciated:</p>

<pre><code>Private Sub chboIssue_CheckStateChanged(sender As Object, e As EventArgs) Handles chboIssue.CheckStateChanged
    If chboIssue.Checked = True Then
        gbIssueSearch.Visible = True
        gbNewSearch.Visible = False
        chboNew.Checked = False
    ElseIf chboIssue.Checked = False Then
        gbIssueSearch.Visible = False
    End If
End Sub

Private Sub chboNew_CheckStateChanged(sender As Object, e As EventArgs) Handles chboNew.CheckStateChanged
    If chboNew.Checked = True Then
        gbNewSearch.Visible = True
        gbIssueSearch.Visible = False
        chboIssue.Checked = False
    ElseIf chboIssue.Checked = False Then
        gbNewSearch.Visible = False
    End If
End Sub
</code></pre>