Not detect USB drive [Windows 8.1 UEFI mode]

[Andhika Anggriawan S]

I use unetbootin-windows-608.exe + administrator and using Windows 8.1 64x with UEFI boot mode

When run it, it detect only drive c
Type: Hard Disk: Only C:
            Drive usb: nothing

DISKPART> list volume

  Volume ### Ltr Label Fs Type Size Status Info
  ------------------- --- ----------- ----- ---------- ------- --------- -------
  Volume 0 E DVD-ROM 0 B No Media
  Volume 1 F DVD-ROM 0 B No Media
  Volume 2 C NTFS Partition 97 GB Healthy Boot
  Volume 3 D data NTFS Partition 316 GB Healthy
  Volume 4 Recovery NTFS Partition 300 MB Healthy Hidden
  Volume 5 FAT32 Partition 100 MB Healthy System
  Volume 6 J Hitachi NTFS Partition 465 GB Healthy
  Volume 7 G FLASHDRIVE FAT32 Partition 3818 MB Healthy

Volume 7 is the USB drive with letter G at windows, but not detected at Unetbootin