Did you set the Maxtransfer value of your HD partitions at 00x01fe00?
If you didn't set this value, then you couldn't run any WHDLoad Games.
I had this issue 17 years ago with my Blizzard 1260.
Two years ago I also bought an Amiga 4000 and put a 3640 card with 040-060 adapter and Full 68060 processor and I can start WHDLoad games without any issues.
