web connection

2 XP PC are in network. PC A is connected to web. Using network wizard I allowed to share this connection with other PC in network. On PC B I said that it goes to internet through network. Everything was fine. However PC A dials internet each time when PC B opens windows explorer. To prevent this I opened propertyes of internet connection on PC A and unchecked boxes
'Establish a dial-up connection whenever a PC on network attempt to access internet' and 'allow other network user to control shared internet connection'. Since this time whatever I change PC B cannot connect internet.