Paradox and Year2000

I have recently written an App using Paradox7 and have found that when a
table is not year2000 compliant. e.g. I sort by date and find that date
1/01/90 is AFTER 1/01/00.

How do I make my tables year 2000 complient, which probably translates to
this question: How can I make my dates four digit dates?
My project is DEAD if I can't fix this...please help.