hi, which version of the PPT are you using? have you done the 1-point test as described in the manual?
also, which volume are you tracking in, and which distance do your LEDs have? are you using bright markers (marked with a red dot on the black battery case) or normal markers?
could you please send an email message with above details (as far as you have the info) to
support@worldviz.com?
then we'll try help you fix the described problems, so you get a solid tracking performance