ok...I got around it now...but I am not satisfied.
1. I created a copy of this WSDL file in C:\
2. The above error shows it cant find ws-addressing.xsd. So I placed this file directly under c:\
3. It next gave error it cant find the xsd file (which has been imported in the WSDL). So I manually copied that file too to the C:\
Now it is able to parse. But this is ridiculous. Obviously I must be doing something wrong. Can somebody guide me.
So while its not exactly a problem with Asynchronous services, the problem is soapui is not able to find the imported schemas.