Issue with my laptop

Hello,
I have a toshiba laptop for 2 years now, and for the past i been using the PC card to use the internet, but just two days ago i try to connect to my brother internet truw wireless and it wouldnt let me, i am not a computer geek or nothing , i mean i know the basics and i few people already look at my computer and couldnt fix it is anything wrong. I went to internet properties and it saids that my network hardware is disconnected , i try the little switch on the side of it that is for and is on, so i really dont know whats going on, i will really appreciate your guys help.

Thank you.