uname -a output does not change after kernel upgrade

[freebsd-questions]

Hi,

I have upgraded FreeBSD server from 5.3-RELEASE to 5.4-STABLE (tag=RELENG_5)
but when I run 'uname -a' it displays the same message as before:
---
server-98> uname -a
FreeBSD server.example.com 5.3-RELEASE FreeBSD 5.3-RELEASE #1: Fri Apr 29 23:04:18 EEST 2005 
root at server.example.com:/usr/src/sys/i386/compile/SERVER  i386
---

What I did:
# cvsup -g -L 2 stable-supfile

# cd /usr/src
# make buildworld
# make buildkernel
# make installkernel
# shutdown -r now

# (stopped apache, postfix and other daemons)
# cd /usr/src
(I did not run 'mergemaster -p' here, could it be the cause of that problem?)
# make installworld
# mergemaster

--- cat /etc/make.conf ---
PERL_VER=5.8.6
PERL_VERSION=5.8.6

CPUTYPE=i686
NO_X=true

KERNCONF=SERVER
--------------------------

After that I also rebuilt the kernel by
# cd /usr/src/sys/i386/conf/
# config SERVER
# cd ../../compile/SERVER
# make depend
# make
# make install

But nothing changed.

Any ideas?

Jurgis