In my web.config I have my authentication set as
<authentication mode="Forms">
<forms loginUrl="Account/Login.aspx" protection="All" timeout="30" name=".ASPXAUTH" path="/" requireSSL="false" slidingExpiration="true" defaultUrl="PendingFilings.aspx" cookieless="UseDeviceProfile" />
</authentication>
location path="Account/Login.aspx">
<system.web>
<authorization>
<allow users="*" />
</authorization>
</system.web>
</location>
<location path="Default.aspx">
<system.web>
...
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