Volume Pedal

Hello! I’m using a Line 6 FBV Shorboard MKII which ist assigned to a Volume Pedal in Amplitude. Unfortunaltly the sound is swelling very late while using the pedal. From 0 to 80 nothing ist happining and from 80 to 127 it is getting louder really quick. Does anybody know where I can fix this. I’m using Cubase LE.