Picked up this useful tit bit
Those who are trying to integrate Ax 3.0 clients with BizTalk Server 2006 and Analysis Server 2005, please note that at the time of writing this may not be possible.
Particularly with Analysis Server 2005 (AS 2005), the problem seems to stem from the fact that whereas by default AS 2006 has moved away from DSO (Decision Support Objects), Ax 3.0 is basically a DSO enabled program. Though (to some extent) Ax 3.0 is able to speak to AS 2005 using the backward compatibility feature of AS, subsequently when you try to view the cube inside Ax 3.0 it falls through.
As Touchstone do a fair bit of Axapta work this could have bitten us.