Need Solution: Access Denied for Site Collection Administrator

Question

Hi Friends,
I am facing an unexpected issue in my SP Portal Application.
 User "portal01"  has Site Collection Admin rights in Central Admin but "portal01" neither edit nor create any new pages (or any job which should be done by an Admin) in my application. 
Neither those tabs/option are apperaing which generally appear for an Admin in a site.
Means "portal01" is behaving like a noral Reader but Central Admin shows that he has Site Collection  Administrator right.
Please help to get rid of this issue.
 
Thanks,
Brajendra Rathour