Word 2K – centering text

I have trouble centering text (sentences)in Word 2000. One of my users have a 15 page doc and can’t center properly one some pages. When centering text on one page just the test selected centers but on some pages when trying to center the selected page the whole page centers. I would like to change it so only the selected text is centered not the whole page. I am sure its just an option someone but I can’t find it. Please Please help.

Islander