Problems invoking external web page that requires authentication

We have a web service deployed to OAS 10. This web service needs to be able to open a URL and read the results. This URL requires authentication.
We have a subclass of Authenticator that provides the user name and password.
When we run this web service using the debugger from JDeveloper, it works just fine. However, when deployed to the app server, it fails.
java.io.IOException: Server returned HTTP response code: 401 for URL: http://... at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1149)
I've stripped out the URL details, but it's invoking a report using Microsoft's SQL Reporting Services.
If I read the error stream, it indicates that request couldn't be authenticated.
So, I'm hoping some people here can point me at what's different between the debugger environment and the application server environment. We suspect that it may be related to permissions in a java policy file, or perhaps some other file from which the application server derives its permissions. But our fiddling with these hasn't helped so far.
So, any ideas as to what went wrong? Ideas on how to open things up so this works?
Thanks in advance for any help provided.
BTW, if there's a better forum into which this should be posted, please let me know.

Greetings,
401 indicates authentication failure, as you have stated. Once deployed, have you attempted to access the report URL using the uname\pword combination with the strings which are hard-coded in your subclass? You can turn up logging to FINEST and customize what logging on the server returns. Login to your OAS administration portal and review the logging options there. If you start the server from the command line, you can view the output there real-time.
-Michael

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