You may need to disable your original sound card (especially if it's an on board card). Usually done in the BIOS or via a hard jumper on the mobo.
I would do this (in order):
1. Device Manager- remove both soundcards
2. Power down, jumper out your onboard card (if that's what it is and how it's done). If not on onbard, just pull both the original card and the Maya.
3. Once both cards are removed, power up and let you computer boot all the way through without any sound cards.
4. Shut down, install the Maya in a slot that doesn't share any IRQs.
5. Power up and install the Maya driver when asked.
Hope this helps. If not, make sure you have all the latest drivers for the Maya, your video card, and your mobo chipset.