Used an excel file to create labels last month. then modified the file,
adding a column of info. Now when I select that file as my source, it
appears in Word mail merge as if the new column doesn't exist.
Try re-attaching the data source to the document. You may need to display
the mailmerge toolbar (View>Toolbars> Mailmerge) and then using the first
button on the Toolbar, change the document type to a normal Word document,
Save it, then change it back to a Label type document and then attach the
data source.

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Hope this helps.
Please reply to the newsgroup unless you wish to avail yourself of my
services on a paid consulting basis.
Doug Robbins - Word MVP
> Used an excel file to create labels last month. then modified the file,
> adding a column of info. Now when I select that file as my source, it
> appears in Word mail merge as if the new column doesn't exist.