internet connection checker?

hi is there any software available for windows sp2 pro dat keep on checking the status of my internet connection and if it is disconnected it automatically reconnects using the default internet connection.
i hav bband ul900.. sometimes when i wake up in the morning , the internet is disconnceted already wothout my knwledge or interference....
so i want any software dat keeps on monitoring my internet connection periodically and in case of disconnection it automaitically reconnects...

ps( i have already unchecked the idle disconnect option in my connection maker and plz dnt refer anythng about it)

a freeware wud b welcomed