6400r and linux

[jjc_uk]

6400r dual processor
both processors are not being detected ?
I am using smp kernel
have tried
centos 4.4
red hat 7.3
any ideas please


cat /proc/cpuinfo shows
processor : 0
vendor_id : GenuineIntel
cpu family : 6
model : 7
model name : Pentium III (Katmai)
stepping : 3
cpu MHz : 550.049
cache size : 512 KB
fdiv_bug : no
hlt_bug : no
f00f_bug : no
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 2
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 mtrr pge mca cmov pat pse36 mmx
fxsr
sse
bogomips : 1101.09