"Unsupported Method" - WSDL Connection


i'am trying to create a new Web Service Connection. After filling in the path of the WSDL and pressing the validate Button, i get the Errror:

"Unsupported Method(s) found. Go the the Configuration tab for more information"

Within the configuration tree i see a method called "Export_export" that is striked-out. The invalid Method Information is: 

'The data type ExportReqeuest is not supported for the in0 parameter."


Any help is greatly appreciated.