It was perfectly working until i manually changed the role name in the database and also updated in the code file accordingly. I got the problem of redirecting to the login page. I've manually checked that the user is assigned to the given role and the spellings of rolename after modifications are also matched in both the db and the C# class.
I wanted to know what else could be the conditions of redirecting to the login page except that the user is explicitly not assigned to a particular role?