YUMI Multiboot USB Problem

I have several ISOs I have set up on my USB with YUMI but my USB cannot be detected in the BIOS. I have used other USB-booting related software such as Universal USB Installer and Rufus with no issues with Ubuntu, as my USB appears in the BIOS and I am able to boot with no issues. I'm having a really tough time finding information online in forums. Wondering if anybody has ever had issues with this before...

The distributions I'm attempting to add are:

  • Ubuntu
  • Tails
  • Backbox

and the Trinity Rescue Kit. 

Any troubleshooting tips would be handy. USB is 8 GB so size isn't an issue.

Just go use: Easy2Boot

http://www.rmprepusb.com/tutorials/72---easyboot---a-grubdos-multiboot-drive-that-is-easy-to-maintain

 

Had all sorts of problems with YUMI when tring to make a multiple OS installer flashdrive.