Hi I own a Peavey Mixer xr1200. Just got it yesterdsy. When I pluged at first it was great. then I started to test each of the channels with an mic and it blew the fuse in the back keeps and keeps burning out when I turn on the switch. I notice that the plug is missing the ground prong it should have three prongs but only has two. Can this be fixed? Bill please email me at fridaynightjukebox@yahoo.com