InfoPath Dev

Thank you so much for your suggestion!  Changing it to basic, along with changing my SSO entry to not use Windows Authentication, did the trick! 

Did you figure this out? I am running into the same problem - whenever I display the form in a browser, it results in a 401 error.  There doesn't seem to be much documentation about webservices that are not related to MOSS.  I am calling a service which requires basic authentication but is open to all domain users, on a ...