hi friends,
I have created one asp.net application, When i change the Authantication mode to forms rather than default windows and then try to run the code it is giving an error like this...

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Error while trying to run project: Unable to start debugging on the web server. Server side-error occurred on sending debug HTTP request.

Make sure the server is operating correctly. Verify there are no syntax errors in web.config by doing a Debug.Start Without Debugging. You may also want to refer to the ASP.NET and ATL Server debugging topic in the online documentation.
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My authantication goes like this

<authentication mode="form" >
        <forms name="PSI" loginUrl=/Login.aspx/ timeout=10 path="/">
        <credentials
                passwordFormat="MD5">
<user name="username" password="password"/>
</credentials>
        </forms>
        <passport redirectUrl="login.aspx"/>
    </authentication>

where and all i need to change if i want to convert it to forms mode..

Thanking u
vishnu

Web.config file is case sensitive and very percise on attributes.

authentication mode="Forms" not "form"...maybe this will make it work?