Webservice always in GET

[Guido]

Hi when i run a webservice 'categories' to add a new category with POST method webservice return me the list of categories ! in other words exec alwyas GET method. In local host this go fine ! I exec a method with delphi program. For delphist :

    RestRequest.Method:=rmPOST;

    RestRequest.ClearBody();
    RestRequest.AddBody(XMLData, ctAPPLICATION_ATOM_XML);
    RestRequest.Execute();

I must settings something else on site ?

Bye