Is LatencyMon telling you a "Good" (in most case green and Low Latency) Satus ?
http://www.resplendence.com/latencymon
if so, the unit should works Fine.
Try to Adjust the Touch Sensor Level on the Front of the Unit to MAX. if it´s on the Max you can CALL the Pioneer DJ Support for Help
I knew can Readjust the Plattern,