Can't Place Cursor to Insert Subdocument

[ForWork]

Hi, All.

I'm having an issue with a master document in Word 2003. I've already got the master document set up, and everything works fine. My problem comes when I want to add in a new subdocument.

Everywhere I've looked says that you just insert the cursor where you want the subdocument to go, and insert it as normal. However, there's no space between my subdocuments for the cursor to go, so it either places the cursor at the end of one subdocument or the beginning of the next. Then, when I go to insert the new subdocument, it inserts it within the existing document, rather than between them.

Any help is much appreciated.