Strange,
Where did DH3 come from?
(You must have created a new empty hard disk, called DH3 - no, you must load one thats already there - system.HDF)
Forget about DH3...
In the AF6 settings you went into the Hard Drives section, then you pressed the button marked Add Hardfile...A new window appears, at the top where it says path, press the button at the side...A requestor window appears...look for a file called System.HDF..click on file, press open ...you perhaps saw something like :C:\workbench\Amiga folder\System.HDF , click OK
Then press start...
If nothing happens after that, then it`s time to read that weblink ...
good luck...