Problem in web references while debugging

[pramod]

In c#.net project I have added a web service(by adding web reference) .
Now whatover changes i am making in c#.project in the existing funtion,
it is not reflecting and it runs the previous code because of caching and
even it skips the break point.

So,when i removed the web reference ,it accepted the changes. but after i
added the web reference , again the problem started.

so please suggest how to remove the caching of web service and why it is
skipping the break point .