Try to reformat the USB stick first. In Explorer, find the USB drive and right click it and click Format. Stick should be formatted FAT32. It is best to format the stick before every file is loaded to it. And be sure you unzip the file on your hard drive, and then put it on the stick. Always use Safe Remove from the Tray Icon (Tool Bar, Lower Right) to avoid data corruption.
Another tip... When you put the USB drive in, the light might still be ON and B-L-I-N-K-I-N-G on the stick. That means there is like a surge circuit on the stick (a good thing). Simply slide the stick out and immediately slide it right back in. Now it should work okay.
Hope This Helps!!
