Can you name the vard version exactly? - sound blaster aint helping much, just means it's a Creative product, whether it's a Live!, Audigy , Audigy 2 or something else, we cannot know until you tell us, even the model ID would be helpful.
Follow Rage's link and download the newest drivers for your card, but be sure to uninstall your current ones before installing the ones from Creative's site.
Error 10 usually means either the drivers are incorrect or there's an IRQ conflict between the soundcard and some other device - if it's because of the drivers, the ones from Creative's site should solve that, if it's an IRQ issues, try moving card yet again into another slot.