Ipbox flash

Hi
I have a gigablue ipbox running vix4. I want to flash the dam thing with a different image. How is this done? So far I have a usb stick with the image on it but the box won't seem to read it on boot. I've been told I have to wait for a purple light then press ok but the box just boots into vix4.

Thanks

i followed the link from the Lavatronics download centre for the gigablue ipbox

- - - Updated - - -

A new USB stick and it worked. Thanks again.