[CentOS] Bug 8254 IO-APIC Timer not connected

Hello,

I have this problem with my home computer, when i start the computer i 
get this message: Bug 8254 IO-APIC Timer not connected.......

Searching in Google i found severals threads about this, someone says 
add acpi=off to your grub, some others says add acpi=ht, etcetera, I 
already test all I have found, and every time I turn off the machine 
always stay on "power off" and nothing happends.

Right now I am using acpi=ht on my grub, if I use acpi=off olny shows 1 
processors instead of 2.

Anybody out there have an idea of what is going on this?

Any help is a appreciated

P4 3.0 Ghz HT EM64T LGA-755
1 GB RAM
1 SATA 120 GB (sda)
2 ATA 80GB (hda & hdb)
Motherboard Gigabyte 8S661FXM-775

SELinux disabled.

uname -r
2.6.9-22.0.1.ELsmp

uname -a
Linux chafiux 2.6.9-22.0.1.ELsmp #1 SMP Thu Oct 27 13:14:25 CDT 2005 
i686 i686 i386 GNU/Linux

lspci
00:00.0 Host bridge: Silicon Integrated Systems [SiS] 
661FX/M661FX/M661MX Host (rev 11)
00:01.0 PCI bridge: Silicon Integrated Systems [SiS] SiS AGP Port 
(virtual PCI-to-PCI bridge)
00:02.0 ISA bridge: Silicon Integrated Systems [SiS] SiS964 [MuTIOL 
Media IO] (rev 36)
00:02.5 IDE interface: Silicon Integrated Systems [SiS] 5513 [IDE] (rev 01)
00:02.7 Multimedia audio controller: Silicon Integrated Systems [SiS] 
Sound Controller (rev a0)
00:03.0 USB Controller: Silicon Integrated Systems [SiS] USB 1.0 
Controller (rev 0f)
00:03.1 USB Controller: Silicon Integrated Systems [SiS] USB 1.0 
Controller (rev 0f)
00:03.2 USB Controller: Silicon Integrated Systems [SiS] USB 1.0 
Controller (rev 0f)
00:03.3 USB Controller: Silicon Integrated Systems [SiS] USB 2.0 Controller
00:05.0 IDE interface: Silicon Integrated Systems [SiS] RAID bus 
controller 180 SATA/PATA  [SiS] (rev 01)
00:0a.0 Ethernet controller: 3Com Corporation 3c905B 100BaseTX [Cyclone] 
(rev 30)
01:00.0 VGA compatible controller: nVidia Corporation NV34 [GeForce FX 
5500] (rev a1)