i tested many things to know this things ! totally when i use vpn connection (pptp) youtube movies when they loaded 50% i close firefox window but my firewall still shows me a program, connection or .... that using all of my internet bandwidth i tested my vpn connection with IE and eveyrthing was ok then i installed traffic comp program i just activated vpn and then vpn connection and everything was ok! it means when i went to youtube and select a trailer when it loaded 20% i closed the firefox and all of my internet bandwidth became free then i tested it again without traffic comp and again that problem after i close my firefox window (youtube site) still that movie loading and all of my internet bandwidth using by a firefox i don't know but i think this is something between firefox and vpn connection can someone help me ? == This happened == Every time Firefox opened == activated vpn connection