Andy,
I don't see a CustomerName field in my Customer table, is this a field you put in? There's a Name field and a Customer field. The Customer field is a dropdown box, which is what we use to link screens and tables together. For instance, the Activity table has a Contacts dropdown that is linked to the Contacts table. This allows us to link contacts to activities.
In the CustomerEquipment table you'll see a Customer dropdown field at the top. This is what links the Customer table to the CustomerEquipment table. I'd suggest you do the same type of modification to your two tables and add a Customer dropdown field that is linked to the customer dropdown in Customer. This will then create a link between the two tables.
- Adam