Router Setting - Getting Error On Browser (could Not Find Server)?

Earlier today I was attempting to do something with my router settings and ended up reading on the internet that I needed to do a hard reset to access my router interface - when I typed in the IP address, it came to a "could not find server" error in the browser. After doing the hard reset (holding down the reset button for 30 seconds) I was able to access the router, and adjust the settings. After doing this though I was no longer able to connect to the internet through the router, although the router is sending out a signal (it says connected to linksys but "no internet connection"). I am currently connected directly to the modem right now using my laptop.

Additional Information:
Router model: WRT45G v.3
ISP: Bellsouth

TL;DR: Did a hard reset on my router, now it's sending out a signal, but no internet. Modem still has internet, as does the router, (the internet button is green).