Make sure that you don't have that table filtered out in your list of tables in the poker site's software and (obv) make sure you have your poker site's software running at that time.
Find a table that you can see in both TT and Stars lobby, and try that one. I've just tried it and it worked. Are you using Vista? Are you running everything as Administrator?
OK, I assume you were able to open the same table directly in the pokerstars lobby?
Please enable logging, reproduce the problem and submit your PokerTracker.log file to the Support system , and link to this thread in the reference field of the ticket so that we can investigate.
I'm running Beta 19 on Windows Vista SP1, having same problem. No filters, I can see the table on Pokerstars lobby. Already submitted a support ticket with log.