There is a small grid window in the IR software that shows the three sensors on your head relative to the IR Sensor mounted on your monitor. Make sure you are centered up in the grid or you will have issues like cichlidfan suggested.
How are you guys marking your SPI points when using CCRP? Through the SPI point on the HUD or using the targeting pod? I've noticed that marking the target with the HUD is not that accurate especially the farther from the target you are.