PokerTracker

I am using PAH on Titan (ipoker) and had no problems, but all of a sudden it is not showing my onw stats anymore. N/A in all columns. The stats for other players are working.

Any ideas?

Are the hands importing correctly into PT2?
Do you have the correct databases selected in Options -> Preferences -> Databases -> Holdem? (i.e. the same one that you're importing into in PT2)

The first session I recognized that my own stats don't show up, I had error messages when importing hands into PT2. But on the next session I didn't had any error on PT2 but still the problem with my stats.

The databases are selected correctly.

Please enable logging, reproduce the problem on a single table and play 30+ hands, and send the PAHud.log file via the Support system so that we can review your configurations and troubleshoot the issue.
Tutorial: How to Create a Log File