You have the dos drivers installed? You don't need them unless you use dos programs in real dos, not dos window.
I only install the windows drivers w/any SB I install.
In device manager does it show SB16 Emulation?
If it does it has to be on IRQ 5.
You can set it as 5 in your bios,, just assign irq 5 as legacy/isa.
Hope it helps