TDatabase and STANDARD Paradox, Can't find records entered on next run

I have been using DELPHI 2.0 CS and Paradox datafiles. When I use a TDatabase
component, and link all my tables to that component, everything seems working. I
do lots of work, and eventually go to sleep. Later on, when I reopen the
project, I see that none of my updates to the datafiles are committed.
If I do not use a TDatabase Component, and tie all TTables and TQueries to the
actual directory path, they really work.
So what is wrong with TDatabase?.