WebException occured

well
i m developing a Smart Phone application in .net Compact Framework(C#).i have made a 'webservice' in my local machine, but when i m going to access the 'webservices' from my application in HttpResponse section throwing an Exception called 'WebException' and application terminate with an Exception After searching from the internet i came to know that this error will throw when application (.net compact framework) can not find the path of the 'webservices' , so how can i add the web referanse for the application with actual path of the 'webservices'

plx help........