How to plug in camera mic?

I bought a MIC-1 for my camera from JJC. I plugged it in to the audio outlet on my camera (Nikon d3100) and put the battery in and turned the mic on. However when I started recording nothing happened to the sound quality when I talked it was the exact same.Am i missing a step? Can someone let me know how to work the audio?

Added (1). It's a shotgun mic.

Read the manual:
http://www.nikonusa.com/...100_EN.pdf
Pages 2 and 3 have nothing marked "Mic" - other than the location of the built-in mic (page 2, item 46). That leaves the "A/V Connector" (item 26).

The A/V connector (page 126) is to connect the D3100 to a TV to view what the D3100 has recorded. This ia AV-out only. Not AV-in. Plugging a mic into the AV-Out will not change anything. As you called it, the "AV-outlet" - is not an AV-inlet.

Your camera does not have a way to connect and external mic.

You can use an external audio recording device any sync that audio with the video captured by your camera… And, depending on which external digital audio recording device you got, the Mice may work with it. I like the Zoom H2 and H4n. There are LOTS of others from lots of different companies - like Tascam, Edirol, Marantz, Sony, Olympus…