Have you done all the BPS or BPS Pro troubleshooting steps to confirm, eliminate or isolate what is causing the problem?
BPS Pro troubleshooting steps
http://forum.ait-pro.com/forums/topic/read-me-first-pro/#bps-pro-general-troubleshooting
BPS free troubleshooting steps
http://forum.ait-pro.com/forums/topic/read-me-first-free/#bps-free-general-troubleshooting