C# Rest web service Post Parameters are always null

I have a simple Restful C# webservice contaning, with this post function:

public void Post(HttpRequestMessage value) { if (value == null) Debug.WriteLine("Post *** Request. We got null"); Debug.WriteLine("Post Request. We got: " + value); } 

I'm testing it using a simple HTML page containing this code

<form action="http://localhost:44378/api/values" method="post"> <input type="text" name="data" value="mydata" /> <input type="submit" /> </form> 

The Web service recieves the Post request, however it doesn't seem to get the data I send it. I get always null.

Any clues what's going wrong and what I should change?

Thanks alot.