Access Denied for Central Administration

Scenario:
We were configuring Form Based Authentication for our web application and after configuring we can go to CA home page easily but were getting Access Denied on all other pages. It was not accepting the Windows Credential and was prompting repeatedly.

Solution:
By mistake we added the Role Manager to CA. While configuring the CA , you need to configure only your Membership provider. You will get Access Denied when you try to access other pages if you have configured the Role Manager for CA.

Removing Role Manager solved the issue