Can anyone tell me why cant I use my 3rd USB port?

[NikhilSaju]

There is a metallic thing inside one of the 3 USB 3.0 ports, which prevents me from inserting a USB. Can someone help?
Well here's the picture,
http://i64.tinypic.com/2qtxt1e.jpg

 

[rgd1101]

how to attach pic
read
http://www.tomshardware.com/faq/id-2580030/detailed-instructions-posting-images-tom-hardware.html

short form
upload to imgur and post the link