vortech bov no sound

I have a 94 civic si with a stage2 rev hard kit. the kit came with a vortech bov(looks real good), but I dont hear it at all. Anybody had the same problem? any suggesstions?

is the vacume line connected to the blow off valve? if its not connected then the bov will not open
1

or it could be that u have a small boost leak in charge pipes somewhere and its not getting pressure