Now the adaptor works!!!!! I don't know why, but yesterday the adaptor didn't work, today works.
Thanks for your help and pacience

Hmmm .... , can you say if your keyboard and USB wi-fi dongle work/function when plugged into another computer? That is the USB ports on your RPi might not be functioning, is your RPi a B+ version? No, my model is B. I don't have a usb keyboard, but I've tried a wireless mouse and raspberry has rec...

I changed wifi adaptor and now raspberry recognize it. As an alternative to using /etc/wpa_supplicant/wpa_supplicant.conf: [once your wifi adapter is recognised] Edit (as root) /etc/network/interfaces to resemble this: auto lo iface lo inet loopback iface eth0 inet dhcp allow-hotplug wlan0 iface wla...

So, the output: uname -a Linux raspberrypi 3.12.22+ #691 PREEMPT Wed Jun 18 18:29:58 BST 2014 armv6l GNU/Linux lsusb Bus 001 Device 002: ID 0424:9512 Standard Microsystems Corp. Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 001 Device 003: ID 0424:ec00 Standard Microsystems Corp...

Thanks for your answer, but I have discovered that my usb keyboard doesen't work, so I need to configure wifi from command line, but I don't know how to do.

Hi. I'm a newbie in Raspberry, so I need your help. I have read many tutorial about wifi configuration, but all that stuff has confused me. So, I'd like to know only 2 things. 1, I want configure wifi. 2, I want connect automatically raspberry to my wifi connection. Maybe you have read this question...