How do I insert a 34 express card into a 54 slot

I have a Toshiba Laptop Satellite L305-s5933

located here under Specifications, Communications, Ports

http://www.newegg.com/Product/Produc...82E16834114613

As you can see it takes a 34 or 54 express card

So I got a 34 express card, it is located here:

http://www.ebay.com/itm/170653516740...84.m1439.l2649

I tried to insert it and It just keeps sliding around. There is a little latch off to the side and I've press it and slid it around and tried pushing it. Nothing happens. I don't want to push it too hard or it will break.

I've had the laptop for four years and this is the first time I've tried inserting an express card. Did I break something?

Are there any tricks to do doing this? I'm doing this because I want to upgrade to USB3.