problem with WebMethod in c#

Hi I have the following 2 classes in say a project public class abc { private int k; public abc(int a) { k = a; } public int getval() { return k; } public void setval(int m) { k = m; } } *********** public Service { abc test1 = new abc(20); [WebMethod] public int getcatalog() { return test1.getval(); } [WebMethod] public void change(int h) { test1.setval(h); } // here whatever code the .NET creates for me for a webservice..... } both the above classes are in the same namespace. ( actually the second one is a WEBSERVICE ) NOW i create a windows application and add Web Reference to the above. The problem is say i give 1) ss.getcatalog(); // ss is say the object of thatwebreference.class 2) ss.change(132); 3) ss.getcatalog(); I DO NOT GET THE CHANGED value if i print getcatalog() ie., i get 1) and 3) to be the same value. why is it so .... ? This is just a simple application i put here ... i have much more that i have to build on this .. Help is appreciated. Skar