currently my iphone 3gs is under 3.0.1 firmware, modem 04.26.08

i wan to upgrade to 3.1.2 but after download 3.1.2 firmware from website

when i wan to upgrade it itunes said my phone is not eligible for it....

why this happen??? pls help me to solve it....

This post has been edited by derek221: Apr 4 2010, 02:21 PM