Suse 10 shows only 1 cpu

Hi
im using vmware esxi 5.1 and my guest is suse 10SP3 64bit
at start it was configured with only 1 cpu. i added 1 more cpu.
when i run this command: lscpu,
it shows only 1 cpu installed

how can i fix that?
thanks!

Maybe this can help you:

VMware KB: Hot-add vCPU is not automatically activated in some SLES 11 guests

thanks. but this article talks about adding a cpu while the vm is still running.
i added cpu when the vm was shutdown

uname -sr

should say smp behind the - .
Otherwise it cannot utilize a second CPU/core.
Link

the output of the command is:
Linux 2.6.16.60-0.54.5-default

---------- Post updated at 08:49 AM ---------- Previous update was at 07:35 AM ----------

thanks! solved with the link attached