Wireless problem onmy toshiba sattellie a-105

Hello, when i got to the wireless connection screen it ays it is connected.. when i try to connect to the internet it will not.. i have a pc on the same wireless router but it is hook up thru the ethernet cord.... was working fine let my kids use it and now the wirles will not pop up.. i msconfig the laptop .. nothing new.. i tried repairing the connection to the wirless newtwork nothing new... any ideas ??? please hep