I have an Ibanez RG421 guitar with the Dimebucker in the bridge and the 59 bridge pickup in the neck (Dimebag signature set). I have these set up on the Ibanez 5 way switch. When I switch to the neck pickup, it sounds significantly quieter than the bridge pickup. I also noticed there is no hum when I switch to the bridge, and a slight hum when I switch to the neck. Any idea on what may be the issue?