I had a SB16 PCI for years, worked right outta the box with 2k/XP... if this is ISA based, there may be a solution:
Look up the PnpISA driver (used to ship with iirc, NT 4.0 or 2000, & was used to get ISA SoundBlaster cards working, among other things) online, you are sure to find references as to where to get it (i.e.-> Off which MS NT based Os' CD it shipped on & what ones it works with Os' -wise as well).
* Hopefully, it might solve this hassle for you!
APK
P.S.=> The ONLY thing I can think of that might be an issue on newer Os', is the fact that the WDM (Windows Driver Model) has changed substantially for their NT based family from NT-> 2000 -> XP -> 2003 (the latter 2 being able to use the previous ones drivers no problem, the middle two being able to USUALLY use one another's drivers, & NT upwards often being incompatible with its descendants...)... apk