As you know the Ninco Digital powerbase 1.08 not send Pit In / Pit Out signal to the computer, to have Pit In / Pit Out signal you need to connect a Ninco Digital Multi Lane sensor to the computer, here is some explanation of how to do it:
http://www.mediafire.com/view/?zl74btx03r9tt1n
http://www.slotforum.com/forums/index.php?showtopic=48196&st=0&p=527933entry527933
http://www.slotcarillustrated.com/portal/forums/showthread.php?t=33229
Warning:
do not try to make the cable to connect the Multi Lane sensor to the computer yourself as i will not give any support , i really suggest you to get the cable "Pit Lane to PC USB cable (TTL to USB)" from RichG.