Network Connected At Work, Not Connected At Home?

I uses a laptop as a workstation. i uses it to get online from here at the school and at home. Recently, i can surf fine from work but when gets home when i plugs into network and gets all the signs of connectivity but when using the internet explorer, i only gets the "Work Offline" option and is unable to use the internet. I have a wireless connection set up as well as the regular ethernet connection. I usually only uses the ethernet port and rarely uses the wireless connection but both are running simultaneously.