Pee Four HyperThreading to show 2 cpu in /proc/cpuinfo?

[coyote 0]

I've have Mandrake 9.1 installed on my Abit IS7-E motherboard with a

Pee Four 2.4c with Hyerthreading enabled in Bios. Kernel version is

2.4.21-0.13mdk. I've since installed & boot to 2.3.21-0.13mdksmp

as well as appending 'acpismp=force' in lilo.conf.

 

However, despite all these, /proc/cpuinfo still just showing cpu:0 only.

HT flag is shown on processor features indicating Hyperthreadig processor

detected. How do I enable hyperthreading in this smp kernel? Please

advice.