title: Magento 1.4 to 1.9 Customer, Sales and Invoice Export/Import
body: <p>I have a Magento Version 1.4.<em>.</em> and i have to export our customers, sales and invoices to our new Magento Version 1.9.<em>.</em> .</p>
  
  <p>I tried to use the magento export functionality but that doesnt work.</p>
  
  <p>So i googled a little bit and found some Magento Extension for Export/Import but i am not sure if these Extensions are working.</p>
  
  <p>Also i found some entries here at stackoverflow that there´s a possibility to import database tables but that also didnt work :-(.</p>
  
  <p>Now I am uncertain how I can proceed? Can someone help me. </p>