title: validation failure for TrackRequest Error:cvc-enumeration-valid: Value '1' is not facet-valid with respect to enumeration
body: <p>Am trying to integrate the Fedex shipping API with my website. For this am using SOAP + XML features. But am getting an error that "SOAP-ENV:ServerFaultUnrecoverableClientErrorSchemaErrorvalidation failure for TrackRequest Error:cvc-enumeration-valid: Value '' is not facet-valid with respect to enumeration". 
  Anyone can help will be appreciated.</p>