Getting error while importing the WSDL Definition by URL

HI,
While importing the WSDL Definition through URL i am getting the following error I am currently using SoapUI version 2.5

2009-03-05 10:35:13,562 ERROR [SoapUI] An error occured [error: src-resolve.a: Could not find type 'XrefType@http://ABCD.XYZ.com/service/AccService/CloseCustAcc/PK'. Do you mean to refer to the type named XrefType@http://ABCD.XYZ.com/service/AccService/CloseCustAcc/FS?], see error log for details

Request you to help/advice me

Thanks in advance
Sanjay