Could you attach a picture of the connector on the back of your machine, and the adapter as well?

Thanks!

Good enough, thanks

That's just a Y-splitter, which will only split the same signal to two separate monitors. For your machine, the easiest way to add a second monitor would be via a USB display adapter. Here are some examples: http://www.displaylink.com/shop/adapters. They're fairly inexpensive and can be found at most local computer shops.

Hope that helps!