title: PayPal Pro : « OrderTotal (Amt) : Required parameter missing »
body: <p>I get «  [L_LONGMESSAGE0] => OrderTotal (Amt) : Required parameter missing » in the response of my DoDirectPayment code, although this field does have a value. </p>
  
  <p>This is so with PayPal but it works well using the exact same code with PayPal Sandbox. Here's my PayPal class :</p>
  
  <p><a href="http://codepad.org/3USFbQ46" rel="nofollow">PayPal class</a></p>
  
  <p>And here's my DoDirectPayment code :</p>
  
  <p><a href="http://codepad.org/fhBFcjU6" rel="nofollow">DoDirectPayment code</a></p>