I don't understand weither i'm doing something wrong or something. But i bought a KORG tuner and it will only tune the top 2 strings of my 4 string bass. SO i thought maybe it was the tuner, so i bought a Inteletouch tuner thinking it would be more reliable. But it does the exact same thing, and with both tuners it identifies my D string as a B? Any suggestions on whats wrong? Or maybe that i'm personally doing something wrong?