Pet Abilities - No sound, no visuals

[vanadiel]

I can't see or hear any of the abilities used by my pets as Arcanist, Summoner and Scholar.

My pet's abilities are invisible and make no sound. There is also no sound when my pet is spawned/summoned. The only thing I see them do is their bodies moving, the numbers of their damage/healing, and the name of their buffs (e.g., Whispering Dawn).

I have played with my game settings. Maximum, medium, low, custom; nothing seems to fix my problem . Can anyone help me pinpoint the problem?

My computer specs are

Operating System: Windows 8, 64-bit
CPU: Intel Core i5 3570k @ 3.40 GHz
RAM: 8 GB
GPU: AMD Radeon 6870
Audio: Razer Megalodon's sound card

All drivers are up to date

AMD Radeon HD 6800 series: 12.104.0.0 (driver date 3/28/2013)

Edit: AMD Catalyst 13.8 Beta2 did not fix my problem either

Razer Megalodon: 6.2.9200.16384 (driver date 7/25/2012)