Please post PT3 issues in the PT3 section of the forum.
Firstly, please run Database > Housekeeping with the default options ticked - your cache is showing as out of date in the status bar of PT3.
That won't necessarily affect this problem since the Replayer does not use the cache, but you need to do it for optimum performance elsewhere.
What version of PostgreSQL do you have? See Database > Database Management.
If it's 8.3.x but not 8.3.9 or later then you should update before running housekeeping - Directions here
If that doesn't help please report your problem
- your log files will give us more information about what is going on.