CRM Fall 2013 Require Security Permissions for Custom Security Roles

Morning,

I hope someone maybe able to help. We have a couple of basic Custom Security Roles within CRM 2011, these had the minimum permissions.

However these no longer work in our CRM 2013 environment. When we put in the URL,

we just receive the message stating we do not have the required permissions. The screen is completely blank, so no menu at the top nothing is loading.

I have added the additional permissions I found on site:

User Application Metadata (Read and Write both at user level)

System Application Metadata (Read at BU level)

But these still do not seem to solve the issue. Does anyone know of any new permisions or old premission that are now absolutly required to access CRM.

Thanks Graham