I just finished a project where my AS3 Game needs to connect to to a third party .NET web service. It turned out more complicated then I had anticipated, especially since I was asked to dispatch soap package to the web service. Thank god for the community, because, off course, a workaround has already been done.
First off, by some reason, Flash does not like namespaces, nor any <soap:something> formulated XML. So to fix any SOAP XML loaded into XML this Class comes in very handy. AS3:Namespace Remover
Secondly, to actually connect to a webservice, I am using this Class, from the same developer.gofr available for download.
So big ups to Alducente Labs, for all that very valuable sharing…