Wifi card not installing.. half way..

[Caleb D]

Trying to install a wifi card into my mothers old pc so I can have the router in my room, but I am having trouble installing such card. First off, I literally have it HALF WAY installed but the way the case is, its simply wont fit. So my question is, how do I get this thing to fit?! What am I doing wrong? I am afraid if I keep forcing it in like this somethings going to break.. Here are some pictures:

 

[Sakata]

Firstly double then triple check everything and just think about how it should go in. (Visualize it, I know it sounds hokey but it works for me at least.) Aside from that there might be some kind of greater problem that I can't think of ( like size difference between new cards and old PC slots) also can you get a picture of where the card meets the panel?

 

[Unolocogringo]

It looks like you have a PCI card locking bracket. Which holds all cards in, instead of each one having a screw.
In the first picture directly below the power supply cord there is a screw that removes the PCI card bracket.
The bracket is just above the Yellow sticker with an exclamation in a triangle.
Remove the screw that holds it. remove the bracket. Install card. Reinstall bracket and screw.