Sound Card Problem

I have installed an Audigy Sound Blaster card on my computer but the motherboard is not always detecting it. Some times it works perfectly! I can't understand why the changes in humour!

My motherboard is an Asus P4B266.

Is there anybody that can help me?

 

couple things to check: Is your motherboard dusty? Maybe there's dust in the pci slot and the terminals aren't making full contact. Does your motherboard have a built in sound card? if so you prob want to disable it in bios. Maybe the sounds cards are conflicting. Check your IRQ's as well. what version of windows?

 

First of all thank you for your help.
I have already changed the pci slot but that does not seem to be the problem. I'm using the XP version. I don't know if it has a built in sound card.
Sorry for my ignorance but what is IRQ's?

 

ive had this problem with sound cards before; be sure its sitting tightly in its pci slot and nothing is brushing against it like a cable or connector/card. I found that even the slightest movement (from laying it down to standing the tower up) caused it to shift a bit out of place and caused this problem. I ussaly put my sound card in the last slot to avoid trouble