debian kernel upgrade to 2.6.32-5-amd64 but uname still shows 686

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http://serverfault.com – I'm try to upgrade a debian system to 2.6 64 bit kernel with the command aptitude install linux-image-2.6.32-5-amd64 which works fine. The system reboots, /vmlinuz -> boot/vmlinuz-2.6.32-5-amd64 all good however uname -a returns Linux hostname 2.6.32-5-686 #1 SMP Sun May 6 04:01:19 UTC 2012 i686 GNU/Linux Am I missing something or is this correct? (HowTos)