PokerTracker 3 may not be automatically configured to import hand histories from MicroGaming. You will need to configure your MicroGaming poker software to save hand history files as you play. there are many different MicroGaming skins with their own lobby layouts -- you need to access the Hand History window through the poker lobby menu either under Preferences or Menu.
On the Auto Import tab in PokerTracker 3, select MicroGaming Network from the site list on the left hand side then click the MicroGaming Configuration tab on the right.
Tip: If you do not see MicroGaming network listed, check the Show Hidden Sites option.
If you do not see your hand history (GameHistory.dat) file listed, click the Auto Detect button. This should add the correct file to the Database Files Configuration. If it does not, you can manually select the file using the Add button. If you play on more than one MicroGaming site, make sure that all of your sites' hand history (GameHistory.dat) files are listed. If you wish for PokerTracker 3 to start importing hands from MicroGaming whenever you start auto importing, enable the Automatically Start with Auto-Importoption.