problem with configuration of asp.net website application

Hi all,

I have developed a Asp.net website application.It was working
properly, but due to crash of system, I have downloaded
Vs.net 2005 professional edition and sql server express. But now it's
not working.
I have IIS and configured virtual directory also.
The problem lies at this place :-
I have used inbuilt Asp.net login control.Through which i am
redirecting my login page to home page, but it doesn't work.I have
aspnetdb(which has data of membership(creating users and roles through
Asp.net website Adminstration toll API)).
I can see my both database(aspnetdb.mdf and appdb.mdf ) in server
explorer.with previous data.
aspnetdb.mdf shows all the users and roles created in their respective
tables, but it doesn't redirect to home page,after authentication and
authorization(web.config).
please someone one help me to solve the issue .

Thanks in advance