Site Collection Admin Can't Delete or modify Site
The SharePoint farm
administrator or site collection administrator can't do any changes in the site
still has full permissions.
Issue: The site is locked.
Solution: Go into Central Admin unlock the site.
Application
Management->Site Collection Quotas and Locks->Choose the site and then
pick Not locked->Click on OK
Environment: MOSS 2007
Please Comment if you need Any Help.Your Feed back is always Welcome.I Am Happy to Help !!!!!