I recently upgraded from 1.39H to 1.50 through my server cpanel and it did all the upgrading automatically and completed fine.

When i log in to my zen cart admin panel they is no options to change stuff like store config orders all the menu has gone. so i cant change anything etc etc. When i click on version it comes up with

Sorry, your security clearance does not allow you to access this resource.
Please contact your site administrator if you believe this to be incorrect.
Sorry for any inconvenience.

So there is a security issue but the login is the the only login and is the admin login so whats going on?