New Turtlebeach HPA2 headphones, can't seem to set them up

Just got these in the mail, really exited, only one problem.

I dont hear ANY sound when they are connected to my PC, i have them all in the right spots. Is my sound card not able to recognize these? I cant seem to set these up....
These are my system specs
BUNDLE: None
BLUETOOTH: None
CD: LG 22X DVD+/-R/+/-RW + CD-R/RW Dual Layer Drive (BLACK COLOR)
CD2: NONE
CAS: Azza Orion Gaming Mid-Tower Case with See-Thru Side Panel (Silver with Blue Lightning)
CASUPGRADE: 12in COLD CATHODE NEON LIGHT [+10] (RED COLOR)
CS_FAN: Default case fans
CPU: AMD Athlon(TM)II X2 245 Dual-Core CPU w/ HyperTransport Technology
FAN: AMD ATHLON64 CERTIFIED CPU FAN & HEATSINK
FREEBIE_RM: None
FREEGAME_VC02: None
FA_HDD: None
FLASHMEDIA: None
FLOPPY: NONE
FREEBIE_OS: None
HDD: Single Hard Drive (500GB SATA-II 3.0Gb/s 16MB Cache 7200RPM HDD)
HDD2: NONE
IEEE_CARD: NONE
KEYBOARD: Xtreme Gear (Black Color) Multimedia/Internet USB Keyboard
MOUSE: XtremeGear Optical USB 3 Buttons Gaming Mouse
MODEM: NONE
MULTIVIEW: Non-SLI/Non-CrossFireX Mode Supports Multiple Monitors
MONITOR: NONE
MONITOR2: NONE
MOTHERBOARD: Asus M3A76-CM AMD 760G Chipset DDR2/1066 SATA RAID PCIe Mainboard w/ATI 3000 Graphic,GbLAN,USB2.0,&7.1Audio
MEMORY: 4GB (2GBx2) PC6400 DDR2/800 Dual Channel Memory (Corsair or Major Brand)
NETWORK: Onboard Gigabit LAN Network
OS: Microsoft(R) Windows(R) XP Professional w/ Service Pack 3 [+61]
OS_UPGRADE: None
PRINTER: None
PRINTER_CABLE: None
POWERSUPPLY: 800 Watts Power Supplies [+88] (CyberPowerPC XF800S Performance ATX 2.0 Power - Quad SLI Ready)
RUSH: NO; READY TO SHIP IN 5~10 BUSINESS DAYS
SERVICE: STANDARD WARRANTY: 3-YEAR LIMITED WARRANTY PLUS LIFE-TIME TECHNICAL SUPPORT
SOUND: HIGH DEFINITION ON-BOARD 7.1 AUDIO
SPEAKERS: 600Watts PMPO Subwoofer Stereo Speakers
TEMP: NONE
TVRC: None
USB: Built-in USB 2.0 Ports
USBHD: NONE
VIDEOCAMERA: NONE
VIDEO: NVIDIA GeForce 9500 GT 1GB 16X PCI Express (Major Brand Powered by NVIDIA)
VIDEO2: None
VIDEO3: None
VC_PHYSX: NONE
WNC: NONE
_PRICE: (+648)
_view_: detail
-------------------

Any help?
 
Back