Live USB boot problem

[ripcase]

hi,

I'm trying to make a Live USB of BT4, but I keep running into an error I don't know how to get around.

I used Unetbootin to write the BT4-final ISO image to a 8GB thumbstick, It seems to complete fine.

However, when I try to boot from the USB drive it comes up with the following:

SYSLINUX 3.72 2008-09-25 EBIOS COPYRIGHT (C) 1994-2008 H. PETER ANVIN
Could not find kernel image : Linux
boot : _

I tried typing "startx" or running other files from this prompt but I get the same response each time although "linux" is exchanged with whatever I type at the prompt.

I tried downloading the BT4 ISO again, and made several attempts to make a new thumb all without prevail.

I don't suppose I'm doing something wrong but can't find any clues as to what I'm missing here, hopefully someone can send me in the right direction?

thanks.