SanDisk Cruzer Micro thumble USB stick doesn't support Fedora LiveUSB sticks?

help-iconI bought a 4G Sandisk Cruzer Mico Thumble USB flash today,I tested it with Vista,all are just fine,it supports Vista's Readyboost very well,however it doesn't support Fedora LiveUSB stick which was creat by Liveusb-creator.Whenever I boot it,i just see a blinking "-" ,nothing else.What's wrong with it?

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