404 error after migrating to 2005

Question

I created a webservice in Visual Studio 2003.

One of it's methods is a simple "ping" method that takes no parameters and returns void. It's purpose is to "warm start" the web service. I also used this as a quick check to see if my webservice was running properly - I would go to the asmx page in IE, and invoke the method - if I got a blank page in IE with "done" in the bottom-left status, I knew it was working properly - if I got a 404 error I knew something was wrong.

I have successfully migrated the web service to Visual Studio 2005. Everything works except that now when I invoke my ping method from IE, a 404 error is always returned, whether the service is running properly or not - I have verified that it is running properly by calling it from a client.

It would be nice to be able to see a different result in IE depending on whether the WS is up or not, when I invoke the method in IE. Does anyone know how to fix this? I see the same behavior whether I am deploying in Visual Studio or IIS.

Thanks!