Problems with changing groups.

Hello,

I have had Visual Basic for a while, and I'm working on a project for school. Currently it is done. Except, when I click the button (that HAVE been programmed) they do not open their Group. 2 of the 5 buttons for groups work. I was wondering if anyone else has had the problem, and if they could help me solve it.

Below is a snippet from one of my working buttons, and non-working.

Working:

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click

GroupBox1.Visible = True

GroupBox2.Visible = False

GroupBox3.Visible = False

GroupBox4.Visible = False

GroupBox5.Visible = False

Button7.Visible = True

End Sub

Not Working:

Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click

GroupBox1.Visible = False

GroupBox2.Visible = True

GroupBox3.Visible = False

GroupBox4.Visible = False

GroupBox5.Visible = False

Button7.Visible = True

End Sub

Thanks