word 9.0.6926 sp-3

i have a word document that comprises fifty tables.

i have made it so that if any of the tables breaks across a page the first
row of the table should be repeated at the top of the page.

(table - table properties - row - repeat as header...)

i say should because it isn't. i've tried all the various views and even
printed the requisite pages but none of them have header rows.

is this a known problem with word?

are there other settings that could affect this?

many thanks,