If you play multi-table SNGs then you will need to enable tournament summaries as well in order for PT4 to know where you finished and what you won - we can only infer your finish position from the hand histories alone in single table tournaments.
Check the
PokerStars Configuration Guide for how to do that.
If you don't have summaries for your existing tournaments you can request an "audit" file from the PokerStars "Requests" menu (in PS7 this is Tools > History & Stats). Request it in CSV format and you can import that to PT4 to update your data.
If you have a tournament where you think the results should be known but aren't please attach the full original hand history and summary file to a
Support Ticket so that we can investigate.