Beaglebone mass storage space

hi, I just received my brand new Beaglebone Black and plugged it into my Windoze PC. the mass storage in the board did not looks fine, when I double-clicked START.htm, it appeared blank. I tried reading the file with a text editor and there were no characters. The file size is zero bytes. then I deleted all files, but after that i couldn’t be able to connect again, even none of LEDs flashes any more!
does any one knows how to reload the mass storage files back again?
thank you guys.

You are going to have to re-flash the image.

There are instructions on the wiki.