HI all,
I am trying to use forms authentication for the web application.
but the problem I am facing is when I directly give an Url of page in the address bar which needs authentication before accessing the page, the page is getting displayed instead of redirecting to login page.any help will be appreciated.

What have you done so far to set up forms authentication? Is you web.config set up right? Post the authentication portion of the web.config so we can see what might be wrong.

<authentication mode="Forms">
        <forms name="AuthCookie" path="/" loginUrl="aspxfiles/Login.aspx" protection="All" timeout="30" />
    </authentication>

That looks fine.

What URL are you entering into the browser that is causing it to NOT redirect to the login page?

I am giving url of default.aspx which actually should succed login.aspx.

A nice rule to follow would be to allow everyone to see the default page and then secure all other folders so that users have to login.

So, the root of your web app will be anonymous access and then everything in the "secure/" folder would need authentication.