Printing Letters using relational information

[Field]

I have a database containing "client" records and another containing "contact" records. These are relational and I wish to write a standard letter for the "Contacts" using a new layout.

When I insert the merge fields to be used the <Name> comes from the "Contact" database but I want the other information such as <Company> , <Address> etc to come from the "Client" database.

Whilst I can choose these merge fields from the "insert merge field" by choosing a related database (i.e "client") when I preview or print I don't get any information across ??

Pretty new to using Filemaker so if you can advise me I would be most grateful.

Cheers guys.