Internal as external hdd

I have an internal WD hdd which I want to use it as an externat.

A friend gave me cables which I use to power it up and connect it via the USB, but it still doesn’t work properly.

I think it might be because of the power, which it too low?

I tried to connect it to another laptop and it works, but interrupts from time to time.

Any ideas what it could the problem be?

Hi you should test the drive for problems with WD data Lifeguard you can find it here.  http://support.wdc.com/product/download.asp?groupid=703&lang=en