Issue with calling an external web service using web service proxy

Hi,
I've created several web services using JDeveloper succesfully in the past, however I'm getting an issue with one that was working ok previously. Have spoken to the developers of the external web service and they say they haven't changed anything. Also if I test the external web service through soapUI for example it seems fine so it would seem that the issue is with the autogenerated code created by JDeveloper.
Basically I get the following exception as it sends the request to the external service:
java.security.PrivilegedActionException: javax.xml.soap.SOAPException: Message send failed: Bad Authentication header format: 'Basic realm="Integration Server" encoding="UTF-8"'
Expected "," at position 33
The user name/password appear correct.
JDev version 10.1.3.42.70
Any ideas?
Many Thanks
Gary
Edited by: user10916721 on 08-May-2012 09:54

Found the answer. Basically I had one proxy web service working and one not both linking to a middle tier written in web methods. THe issue actually ended up being with the web methods code in that the one web service (that was not working) was put together using a backwards compatability mode. Once this was switched back then started working again in JDev.

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