If you just got it I would suggest, HIGHLY suggest, doing a setup on it. That gets rid of most problems 95% of the time. Just look at the stickies, there are some great links to show you how to setup your own bass. If you aren't comfy with that then take it to the store you purchased it at, and ask them to do it since you just got it from them.
Also, where exactly is the ringing coming from? Up by the nut? Near the 5th and 7th frets? More specific information will help us better help you.
Oh yeah, Welcome to Talkbass!