The type or namespace issue in dashboard app

Hi, another head banger for me.
We have embedded a tab in order entry we call a customer query, which allows querying all sorts of ustoemr related information, a bit like a tracker on steroids. Works great, but because we are in process restructuring the acutal order entry, I decided to pull it out as a stand alone program.
So I deployed a blank dashboard and used the customisation layer.
All functions are working perfectly, except when I’m trying to include adapters, ie the PriceListInquiry to get teh current price for a customer.
Any adapter inclusion fails with the error “the type or namespace…”, althouhg they are all included in assembly reference and as alias in the customization layer.
I replicated everything exactly as we did in Order Entry but something seems missing in a deployed Dashboard layer.
I’m out of my comfort zone, anyone able to assist?
Customization Assmebly Reference etc.

Dashboard Program