xblade case AC97 motherboard, audio jacks problem

[semiliat]

hey guys i am buying a new pc on sunday although the guy says the audio jacks on the front panel aren't detected by the motherboard, so i don't know what to think or how to fix it, i'll post the specs of the pc and the add here
System is custom built works Great system specs are:
CPU: 2.2Ghz QuadCore AMD Phenom 9550
MoBo: Pegatron M2N78-LA (From a HP Viola)
HDD: 500Gb Seagate 7200rpm 32mb Cache Sata2
Ram: 4Gb DDR2 PC6400 800Mhz 2x1Gb+1x2Gb in Dual Channel
PWR: 650Watt Toughpower 24pin ATX
GFX: 1Gb DDR5 Zotac Geforce GT 240
Case: X-Blade PC Gaming Computer Case.
OS: Windows 7 ultimate 64Bit
also Includes Sata LightScribe DVD Burner, Nero Burning Software and Avast Pro Antivirus
Due to the XBlade Case only supporting AC97 audio jacks are not detected by windows can be fixed with new case with HD audio jumper pins, PCIe sound card or a USB audio device$40@JBJ. Other than that the onboard Realtek Coaxle & DVI audio work fine As does the Geforce GT 240 HDMI Audio out willing to include my Audio receiver to the right person.
just lookin for some clarity here, is there a way to fix the problem with the X-blade case? or the AC 97?
thanks guys

[Dogg]

There are two audio types, AC97 and HD. The motherboard audio chipset or sound card have to match what the case supports. You can't mix types. If the case is AC97, then the audio chipset also has to support AC97.