problem in shutdown-Redhat linux 7.0

[P Subashini <psuba@xxxxxxxxxxxx>]

Hi,
 i have installed redhat linux 7.0 in my m/c.Everything is ok.When i
prompted to shutdown, it stops with system haulted but not the power is
automatically going down which is possible in Redhat linux 6.2.
I don't know ,is it the bug in 7.0?
If anybody knows,tell me clearly.
M/c config:

intel 810 based motherboard.

Micro ATX SMPS.

Hope to get reply,
suba