Can't open a secure wireless network

Hello,
Can u plzzzzz help me ??? I have a wireless networking device . It's name is ALFA network and it's a USB Highpower Adapter 802.11G . It is AWUS036H USB adapter of the ALFA series . My problem is that I am getting the list of available wireless network that are within range of my computer but I am not able to connect to any of the available wireless network because every wireless network in my list is locked with WEP and WPA keys . Is there any new softwares released to open a secure network??? If yes then plzz help me !!!!!