can not connect to home anymore

I have been using CIS for a while now and everything was working good, I could connect at home and at a casino then all of a sudden I can not connect at Home but can connect at the casino and at the library. I usually just close the laptop and it goes into hibernation at home then open it and connect to whatever network is available wherever I am but for the last week it will connect but only local access, I turn off comodo firewall and use the windows Vista firewall and no problems, I need to get this fixed as I don’t trust the Vista Firewall at all. All help would be greatly appreciated.