Editing Site Settings Gives "Unable to process your request"

Hi,

 I get "unable to process your request" when trying to edit the FIM portal site settings. I'm using my domain admin account I installed FIM under, which is also a SharePoint administrator. I'm trying to edit some basic UI details.

I've installed FIM 2010 R2 SP1 on SharePoint Foundation 2010 with SQL 2008 R2. I tried logging into the FIM portal with the fim service account, but this still gives the same error when editing site settings. I'm using separate servers for the fim portal, fim service DB and fim sync server (all have their firewalls turned off).

Advice on how to resolve this is much appreciated.

Thanks