Trouble with Forms Authentication with IIS7

I want to apply Forms Authentication to my website, it is working with my VS2010 or VS2005 (I used both). When I upload to shared hosting server which is IIS7, it does not work.

I suspect is web config problem. Can anyone help?
Here is the portion of the setting:
<system.web>
<authentication mode="Forms">
<forms loginUrl="/Default.aspx"
defaultUrl="main.aspx" name=".ASPXFORMSAUTH" protection="All" />
</authentication>
<authorization>
<deny users="?" />
</authorization>

...
...
...
</system.web>
<location path="Admin">
<system.webServer>
<security>
<authorization>
<remove users="*" roles="" verbs="" />
<add accessType="Deny" users="?" />
<add accessType="Allow" roles="admin" />
</authorization>
</security>
</system.webServer>
</location>

 

there is no error message. It should allow me to access page under "Admin" folder but it redirects me to the default page as I do not have the permission.

 

Resolution

I am having a similar issue, did you find the problem?