Plz help me i cant play games on my hdtv!

hey i got a new pc today and to test it out i tried to play the free WoW demo, and i got a strange error msg. so i tried instead to play an old copy of risk i had laying around and it didnt work either

im an ametuer with PCs, i got intel core 2 quad, asus p5p43td, ati radeon 4650, 4gb ddr3 1333mhz ram and ive got it through an hdmi into my sony bravia tv.

please can anyone help me?
here is the error msg i got:

---------------------------------------------------------------------------------------------
This application has encountered a critical error:

ERROR #132 (0x85100084) Fatal Exception
Program: C:\Users\Public\Games\World of Warcraft Trial\WoW.exe
Exception: 0xC0000005 (ACCESS_VIOLATION) at 0023:F8815770

The instruction at "0xF8815770" referenced memory at "0xF8815770".
The memory could not be "written".


WoWBuild: 11159
Settings:
SET movie "0"
SET showToolsUI "1"
SET specular "1"
SET locale "enGB"
SET portal "eu"
SET realmList "eu.logon.worldofwarcraft.com"
SET patchlist "eu.version.worldofwarcraft.com"
SET coresDetected "4"
SET processAffinityMask "3"
SET hwDetect "0"
SET gxRefresh "60"
SET gxMultisampleQuality "0.000000"
SET gxFixLag "0"
SET videoOptionsVersion "2"
SET Gamma "1.000000"
SET Sound_OutputDriverName "System Default"
SET Sound_MusicVolume "0.40000000596046"
SET Sound_AmbienceVolume "0.60000002384186"
SET farclip "777.000000"
SET groundEffectDensity "24"
SET projectedTextures "1"

----------------------------------------
GxInfo
----------------------------------------
GxApi: D3D9
Adapter Count: 1

Adapter 0 (primary):
Driver: atiumdag.dll
Version: 8.14.0010.0685
Description: ATI Radeon HD 4600 Series
DeviceName: \\.\DISPLAY1