Router to Switch to Switch.....No Internet at end terminals

Hi Everyone.....
So, I just got Wireless Broadband hooked up in my business. I hooked the LAN to the Router and then hooked up a 16 port gigabit switch. I have three terminals coming out of it (in the bcak of the building) as well as a line running to the front of the building. At the front of the building I have the line going into another 16 port gigabit switch. I have 4 computer terminals coming out of that switch. I AM getting internet at the back of the building .....but nothing at any of the terminals after the second switch (front of the building). Can someone help?

Thanks!