Navision - Intercompany Dimensions not pulling through the Out and InBoxes


We have a client using Navision v4 SP2. They are using Intercompany Transactions sending Sales Invoices and receiving Purchase Invoices through their database to sister companies. Everything works fine but the Dimensions are not pulling through at all. We have mapped the Intercompany Dimensions in all the companies and the Dimensions are not even getting as far as the Outbox.

Is this a known problem in v4.2? Has anyone worked out a solution please?