Sync Groups from AD to the FIM portal

I am following the document "How do I synchronize Groups from Active Directory Domain Services to FIM"

This mentions creating a custom expression on the inbound sync rule as below

CustomeExpression - (IIF(Eq(BitOr(14,groupType),14),"Distribution","Security"))

For some reason everytime I try this, I receive the error "The Function named could not be located"

All these functions are built-in and not ones you need to build yourself....so I'm at a bit of a loss.....any ideas?