ABAP Proxy to SOAP -> Logon to Web Application Server Required

Hello XI Experts,

I have set up an ABAP Proxy->SOAP example in my IDES system. Everything is working correctly.

However, when I execute the program which makes the call to the method "EXECUTE_SYNCHRONOUS", a popup appears asking me to enter logon details to the web application server.

Where do I set the logon information such that this popup no longer appears?

Thanks in advance,

NW.