KALI LINUX LIVE USB WON'T STAY CONNECTED to the INTERNET!! HELP!

Ok so I have now made 2 USB sticks live boot Kali. I made the second in hopes that after everything i learned on the 1st that maybe there was an istallation problem. Nope. When i boot Kali I have an internet connection. Ifconfig iwconfig and network manager all show that I am connected. I can ping 8.8.8.8 and it is succesful. But once i do that or try to use the internet (firefox, apt-get update, anything) the connection no longer works. Even though network manager and everything else still shows me as connected. I can even still ping my own router. Just nothing outside will work. If I boot i to Windows there is no problem with the internet at all. I have been searching for a month for an answer and havent found it yet. Someone please help me.