Yesterday I watched two dvds on my pc with no problems. However, today I've noticed that there is a Poppig and Clicking almost every second when I play any dvd. I'm running:

Sony+rw 2.4x
Sound Blaster Audigy Platnium 5.1
Intel Pent 4 1.8ghz
512 RAM
Klipsch Promedia 5.1
MyDVD 3.0
Ati Radeon 8500 128mb

I've checked all my speaker connections, even from sub to speakers, and pc to sub. I've listened to mp3s and audio cds and no problems. I've looked at all my audip controls and nothing isn't where its supposed to be.