PST discrepancies

I have recently installed a new hard drive in my pc (leaving old as slave to copy files). After installing Office2000(sp1), I copied the Outlook.pst file from the old drive (only other .pst files present were archive.pst). I believe all of my Contacts are there, however, I am missing many new appointments that were added one week prior or were a few weeks old and postponed several times (sorry, I like to procrastinate). I have done the Inbox repair utility, no problems found. I even opened the original personal folder from the other drive, it is the same. Is there any suggestions I can try? I hate to try to remember all of the stuff I added (thats why I use Outlook!).

Please help,
Qsack
qsack@sbycomm.com