asp.net website

[mwm]

I am developing a website of shopping in asp.net in which I have a registration page in this page, I am handling the signin and signup modules. When the user enters his/her username or password and then click on the sign in button go to the home page for shopping if the user is valid with password if not then remain in the registration page and go for sign up to create username or password, I am dealing with websecurity in webmatrix and have made a _AppStart.cshtml file and writing this : \[code\]WebSecurity.InitializeDatabaseConnection("Membership","UserProfile", "UserId", "UserName", true);\[/code\]For this also made a db for membership like membership.sdf in databases but it is not working.kindly provide me the solution for my problem.