I have a Moss 2007 site collection which was running smoothly. However, after moving to Forms Authentication connected to Active Directory neither my Farm Administrator account nor the 2 Site collection administrators can get past the site homepage.

There is no Site Action buttons availabe.

When I log into CA witht he Farm Administrator account the Site Action button exists there so I suspect its something to do with the permissions to the site application.

I have tried to connect directly to the settings URL http://mysite/_layouts/settings.aspx etc but get the ususal error

Error: Access Denied

Current User
You are currently signed in as: xxxx (Farm Administrator Account)

Sign in as a different user Request access

I get the same error when logging in with the site collection admin accounts. Ive also checked to make sure that the sites are not locked out.