Sorry to post this, as I'm sure this problem has been addressed here many times (though I wasn't sure what to search for) but the second from top string doesn't stay in the nut, and I've never really encountered the problem, so I'm not quite sure what to do. The slightest vibration will cause the string to pop out. The strings are brand new. The bass is an Aria Pro II, if that means anything. Thanks for your time.