Visual Basic programming problem

Hello all;

I've been coding a small program for visual basic (Yes it's not a great language but I figured I'd at least give it a try), and I've stumbled upon a small problem.

Code: http://pastebin.com/rqeKiE76

Now, the code works fine until section 6 where the outputs stop showing and the program closes itself. I'm sure I've missed something obvious and so I'm asking you, any help would be apprecaited.

>>9
VB is a terrible language and just looking at it makes me want to die.
Dim Number As Integer
Number = InputBox("Please enter your age")
If (Number > 50) Then
   MsgBox "you are older than 50"
ElseIf (Number < 20) Then
   MsgBox "you are younger than 20"
Else
   MsgBox "your age is between 20 and 50"
End If
Please go die.