can't boot a Mint Cin 17.1 live Sandisk Ultra Fit 3.0 32GB

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Yes, I have have made the SanDisk Ultra Fit 3.0 32GB stick a U2B drive.

I copied the Linux Mint Cinnamon 17.1 ISO to the U2B Main Menu.

When I boot the SanDisk USB stick, the U2B Main Menu opens.

I select   “linuxmint-17.1-cinnamon-32bit(1)”

I get the “LM” symbol on the screen.

Then  “(intramfs) Unable to find a medium containing a live file system” 

Same as all other tried methods of booting Linux from a SanDisk Ultra Fit.

However, a PNY 2.0 8GB drive boots without fail.