Paypal 'Buy Now' button doesn't do anything! Help!

I'm trying to make a website to sell a game on.  I cut and pasted the paypal button HTML exactly as it was generated on the paypal page.  However, when I click it, it doesn't do anything.  Here's the code:
 
1 <%@ Page Language="VB" MasterPageFile="~/MasterPage.master" AutoEventWireup="false" CodeFile="buy.aspx.vb" Inherits="buy" title="Cube-tris! Tetris has evolved!" %> 2 3 <asp:Content ID="Content1" ContentPlaceHolderID="head" Runat="Server"> 4 </asp:Content> 5 <asp:Content ID="Content2" Conte ...