I am developing Flex application hosted by IIS (ASP.NET), i deployed the application adn it is wrking good from the deployment machine, but when am trying to access it from any remote machine i receive an error says that
"Decoding Error : SOAP response cannot be decoded"
When you get this response back from .NET (using a WebMethod), it usually indicates a problem on the .NET side, like it could be returning a complex type which Flex cannot understand, a complex error message, etc.
If you are using Visual Studio, step through your code to see what's happening. Make sure you set debug=true in web.config and when the error is thrown you should get extensive informatioin on its cause. Sorry I can't be more helpful.