Is there a problem with my camera/lens?

I bought a nikon d3100 a few days ago with the afs nikor 18-55mm lens

I'm not sure if it did this before but now when i hold the shutter button to focus, it makes a little rattley click noise. Then when i release the shutter button, it does the same noise.

Any ideas?

Mah ah had dat problem 2 wiff a D3100 ah steeow when me an Jamaw wuz doin a raid an ah jus sole it 2 duh pawn shoh'

That " little rattley click noise" is the lens focusing and the VR stabilizing the image if you have it turned on