My Soul Calibur is not VGA-box compatible, so i hex-edited the image (cdi), then tried on the emu --> ioControl errors, so i burned it on a CD-RW with DiscJuggler, tried loading the game from the CD-RW in the emu and it worked like a charm. Then i created a CDI image from this CD-RW using DiscJuggler, i loaded the image in daemon-tools, fired up the emu, and my game worked perfectly from the CDI image as from the CD-RW.
Strange thing indeed..