Problem with mail merge opening multiple copies of my DB

[HarrySpencer]

Hi, I have 3 mail merge letters that will be used with a access database/queries they work fine, but when opening the documents they seem to open multiple copies of the database even if it its open already. Just wondering if there is a way to stop this happening, as it is likely to confuse as all letters are likely to be open at teh same time and this triggers 3 seperate db to open. Any ideas?

many thanks in advance. Harry