This is a tough question to answer as there are soooooo many variables.
#1 are you using a rope cocker? [centers string which is critical to accuracy]
#2 are you shooting field points or bheads? [some bheads are VERY contrary to xbow use]
#3 what arrows are you currently using?

#4 Have you contacted Horton? [if not, do so asap]

Here's a good start for ya, best of luck, but need more info!!