Can't import CCS 5.3 6670 project into CCS5.4

Hi

I have made a clean install of:

CCS 5.4.0.00091

MCSDK 03_00_00_10

emupack_keystone2 1.0.0.3

When I attempt to import our existing 6670 project I get:

"Unrecognized product of type 'com.ti.biosmcsdk.pdk.C6670' is required by project '<snip>' - please install at least one product of this type before building this project"

How should I resolve this problem please?

BR

David