Alienware m14x r1 is not detecting my 2nd hard drive

hello all, 

I have a problem on my hands that just started happening recently. 

So I bought myself a 2nd hard drive caddy(replaces the dvd caddy) for my alienware m14x r1 and i put my 2nd hard drive in it, but now when i turn on my laptop, the 2nd hard drive does not spin nor is it being detected in my disk management. 

how do i fix this? :( 


thanks