Cydia "Unable to Load; Internet Connection Appears to Be Offline"? - Jailbroken iPhone 3G running 4.1 FW?

Ok I don't get it. Everytime I try to launch Cydia it tells me "Unable to Load" "internet connection appears to be offline". I am connectect to my home wifi connection, however, next to the name of the connection under WiFi it has a lock icon then the full bar satellite icon. I used it while away on business this last week on both secured and unsecured wifi networks and it worked fine. It also worked fine on my home connection before I left. But now it's not working. I can't open a webpage on Safari because Safari says I'm not connected to the internet. But the Wifi icon clearly says I am connected with a powerful signal. I have already restored and jailbroken the phone twice and it still wont let me launch Cydia to check for the unlock update. Can someone please illuminate me as to why this keeps happening and how I can fix it?