xperia e16 W8 wifi problem

hi to all

my phone can search and connect to wifi..and I also can download in internet option

but when I wanna sign in to market it show

cant establish a reliable data conection to the server

when open youtube it show THERE IS NO NETWORK CONNECTION



I HAVE DONE FLASHING WITH PC COMPANION AND SETOOL...IT WONT HELP...



NEED HELP:confused:

via Welcome to gsm-tips http://forum.gsmhosting.com/vbb/f778/xperia-e16-w8-wifi-problem-1761961/