Cannot load WSDL into soapui 2.5 but 2.2 works!

Hi, I've recently upgraded from soapui 2.2 to soapui 2.5.  The version 2.2 can load my wsdl file but in the version 2.5 it has stopped working. The error we get is: Caused by: javax.wsdl.WSDLExc...