Whenever my iPod autolocks after 1 minute, my wifi disconnects when i unlock it. The wifi icon is still there, but my IM apps like Windows Live Messenger and Facebook disconnects. Also when I try to load pages in Safari, it says 'Safari could not open the page because the server stopped responding' The only way i could connect back is to turn off WIFI and turn it back on. My iPod is an iPod Touch 4G, with iOS 4.1. How do i fix this?