Referring a web service

Hi thanks in advance.............I have created a web service to display the
interface that i has developed.I tried to refer the web service within the web
site but in vain.Please give me suggetions as to how to create a referrence for
the web service and to refer the same within my website developed using http.

you first need to create a refernece to it.  you do that by going to your
solution explorer, right mouse button and saying "Add Web Reference". 
that will step you through entering the url of the web service and creating the
interface to it.  You can then use the class browser to explore the methods
created and simply call them.  Lots of tutorials on the web for this.  Here is
one:

http://samples.gotdotnet.com/quickstart/aspplus/doc/webservicesintro.aspx