How, Who, When will someone help me!

Edit Subject

I have to create an Netword chat application in VB.Net 2008 and ASP.Net can you help me or show me an example that may help me. I have to have a server, client, remotable object, web service and website. I have to create my own database to store the users that have been registrated. Web service: Register new accounts(Username/password), check if the username is taken, check to see if a given username and password are valid.
Website : Need to create new user accounts for the chat application. The website must use the web service to interact with the database.
Remotable object:*provide the client a list of all the users who are currently connected to the server. *Send messages to the client. Can someone help me if so, I am more than happy to give all the specifications..... Thanks