Dlink Dir 615 Router Not Connecting To Internet

i ahve a dlink dir 615 B2 router and it wont connect to the internet. on day it was fine and working, the next day the internet led wouldn't change from the red light to the green light.i have tried resetting it about 60 times, while the laptop was on/off, while it was plugged it, while it was without power, while the internet cable was in, while it wasn't, while it was shut down and i reset it and the i pluged it in while resetting it...i dont know what else to do!! short of smashing the bejesus out of it. The internet works fine when i connect the cable directly to the laptop, I don;t have a cable modem or anything, just a plain old cable from the street to my house.