tv will not read usb stick

apple tv won’t seem to get in boot mode (letters running on screen) with a sony 1 GB memory stick that i previously used for other atvflash installs .I followed the instructions to the letter,i even partition and erase the sony stick (GUID) before every try.I even restored apple tv too factort settings and installed latest 3.0.1 update.Then run atvflash with no succes.It never get into boot mode.I know the memory stick is good because it worked in the past.What am i missing?

macmini OSX 10.5.8

so much for payed apps and support…

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