System Monitor shows only 1 CPU (2 present)

[Russ Cook <russcook@mbo.net>]

Hi all,
  I'm running an AMD64 dual core processor, debian64 stable. 
Sources.list is attached.  My problem is that System Monitor 2.8.1 lists
only 1 CPU.  I have a dual core processor, and kernel 2.6.14.4 is
compiled with smp enabled.  The system logs show that both processors
are detected and enabled.  I briefly was running etch, and System
Monitor did show both CPUs.  I don't remember what version System
Monitor was at the time under Etch.  I have since done a clean reinstall
of stable.
  Might this be a problem from running stable?  If not, can anyone offer
a suggestion?

Thanks much,
  Russ

#deb file:///cdrom/ sarge main

deb http://mirror.espri.arizona.edu/debian-amd64/debian/ stable main contrib non-free
deb-src http://mirror.espri.arizona.edu/debian-amd64/debian/ stable main contrib non-free

deb http://security.debian.org/ stable/updates main contrib non-free