Upgradeing software on U-Mix Control Pro (1)

I am trying to upload the firware on my U-Mix Control Pro (1).
I followed instructions in the manual and source A and source B lights started flashing.
A new drive named “midiUpgDisk” came up on my system.
I dragged the U-Mix firmware onto this drive (U-Mix 1.0.3) onto my drive.
Nothing happened?
I followed instructions in the manual and source A and source B lights started flashing.
A new drive named “midiUpgDisk” came up on my system.
I dragged the U-Mix firmware onto this drive (U-Mix 1.0.3) onto my drive.
Nothing happened?