Because It is a proprietary Sound Driver, and they Used Redhat in there Juke system. Its one of the 2 that I found that use the RPM packages.
I am using this on old hardware, really old hardware. So it made sense to use a old Distro. some of the newer dropped support for the Chips Video Chipset, and a few other things that I need.
Modprobe does not work, Yes I think it has to do with the devfs dependency that insmod reports. But I don't know if that's because I am not telling it what IRQ DMA ect...
If I could get Windows to work and load a sound Driver I would, but that will never happen. There were no Win Drivers for this card.