iis 7 forms auth

I'm using iis7 with forms authentication. I attempt to login and sometimes it works and other times it does not. Any idea what is causing this to not properly?


<forms name="secureCookie" loginUrl="login.aspx"
             defaultUrl="/secure/default.aspx"
             requireSSL="false"
             protection="All"
             timeout="20"
             path="/secure"
               />


/secure is the private folder. If I attempt to log in and it bounces back all I have to d ...