Obviously a beginner. I'm using a Intelli IMT-500 Clip-on Digital Chromatic Tuner on a Ibanez Ergodyne EDC-700 Bass, and I can't get it to register anything on the E string. It did the others with no problem, so I figure there must be something I don't know. The bass isn't amped (because it's a vibration tuner I don't need to, right?) Thanks.