So problem can be described as:
1) I created 8 patterns of beats in Pattern Matrix
2) Loaded long acapella sample to Sampler at another track, also turn on Autoseek function
3) Push Play button
4) When song playing i open Sampler with acapella, choose FX chain tab, push "Create FX chain" button and..
5) Acapella stopped but beats from other track are playing :/