Trouble with Mac Word

I have a word document for which I have formated a Table of Contents. When I move the document to another iMac machine all of the text is there except for the Table of Contents. Where the table of contents should be is the TOC marker.

I don't understand why on my iMac the document and table of contents are fine, but when I move it to a different machine it doesn't work. Both iMacs run on Mac OS 10.4.11 and the Word version is Microsoft Word for mac 2004.

Don't know what to do.