buildkernel is up to date What`s that?

[yurevich vasya]

Have a nice day to all!

When i try to compile MYKERNEL, received unknown message of make:

# pwd
# /usr/src
# make buildkernel KERNCONF=MYKERNEL
   'buildkernel' is up to date
#

/usr/obj does not exists.....
Can`t understand myself, what`s wrong?

My system is:
FreeBSD 8.0-STABLE-201002 #0: Tue Feb 16 21:05:59 UTC 2010

I am really hopeing that someone can assist me here.
Thanks for attention
Yours Oleg from Russia