Help on Software Upgrade Hog 1000

Hello,
I tried to update my Software on Hog 1000 from V3.2 (Build162)
to V3.3 (Build177).

Downloaded the Zip File from HES Download page.
Unzipped it
In my directory now appears for the first Disk:

hog 1401 kB BIN-Dat

and for the second disk:

hog 648 kB BIN-Dat

inserting "Disk 1" into the console
turn console on, by pressing "Enter"
pressing "2" "Enter" to reload SW

Now the Console says:
Please insert disk 1, this ist not disk 1!

:17:
What is wrong, anybody can help?

Thanks
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