Don't know how old your units is – we did have a batch of bad switches on some older ones.
Since you're in Italy, you probably don't want to send the unit back here – you should probably go to your dealer. As an alternative, if your unit is out of warranty and you or a friend are handy, you could try opening up the unit and re-soldering the switch. If this fails, contact support@eventide.com, and if they are feeling happy, they may send you a new switch. If they are having a bad day, switches are cheap.
