Hi tj, sounds like you have done everything correctly, I did exactly the same thing and the Boingball blanker works fine for me.
I will check again when I get home tonight and get back to you.
AmigaOne X1000, Boing Ball Fractal R3 white case, XFX Radeon 4890 XXX edition 1 GB, OCZ Vertex 3 SSD & 1TB Sata HD, AmigaOne Keyboard and
Boing Ball mouse (white), 4 GB Kingston HyperX RAM, Official DVD burner. CoolerMaster GX750, Realtek 8169 (Netgear GA311), BenQ 24" Widescreen.