IIS, Net::HTTP::Get, and Basic Authentication

I'm getting a 401.2 from IIS You do not have permission to view this directory or page using the credentials that you supplied because your Web browser is sending a WWW-Authenticate header field that the Web server is not configured to accept. The sysadmin says that basic auth is enabled. Is there something special about how rails handles basic auth? Is there a way for me to see what the server actually gets and what the headers say is acceptable?

My Code:   def get_wsdl(url=nil)     return false if url.nil?     url = URI.parse(url) unless url.is_a?(URI)

    connection = Net::HTTP.new(url.host, url.port)     connection.use_ssl = true     connection.verify_mode = OpenSSL::SSL::VERIFY_NONE

    connection.start do |http|       req = Net::HTTP::Get.new("#{url.path}?#{url.query}")       req.basic_auth 'username','password'       puts http.request(req).body     end   end