Installing a sound card

A friend of mine gave me a soundblaster sound card (don't
remember the model right now)for my HP Pavilion computer
running ME. I installed it, and then had no sound. In
fact, the computer does not recognize that it is even
there. Since it does not recognize it, it won't load any
drivers either. My same friend told me that I must turn
off the factory installed sound software. He couldn't
remember how he did it before. Any help is greatly
appreciated.

Thanks,

Greg