Unetbootin can't see usb drive

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http://www.backtrack-linux.org – I am trying to make a usb backtrack but run into problems cause when I start unetbootin I can not see the USB drive. I have made sure the drive was mounted. I also tried unmounted. I did a reformat of the usb stick, fat32. Did not help either. From within puppy linux I can see the usb drive and I see that the drive is empty. I made sure to do a chmod +x ./unetbootin Running ./unetbootin from terminal first give me to prompts about errors then unetbootin starts like normal. 1st error is lack of mtools and the second is lack of p7zip-full. So I installed those and was sure une (HowTos)