so, My Ibanez PD7 seems to have given up the ghost. i bought a powerbrick thing in the hope of only using one plug socket for both my pedals, yet when i have both the zoom b2.1u and the ibanez plugged in i get some horrible high pitched noise, and the pedals become really microphonic. it doesn't happen with each one individually, or with 2 power supplies, but then that negates the point of the power brick. anyone shed some light on what it could be?