dpkg doesn't show newer kernel packages available?

["H.S." <hs.samix@gmail.com>]

Hello,

How come I cannot see newer kernel packages available with dpkg:
$> dpkg -l linux-image-*

doesn't list kernels 2.6.2* at all. However, I can get some  hits if I
try to install such a package:

$> sudo aptitude -s install linux-image-2.6.21*
Reading package lists... Done
Building dependency tree
Reading state information... Done
Reading extended state information
Initializing package states... Done
Reading task descriptions... Done
Building tag database... Done
Couldn't find package "linux-image-2.6.21*".  However, the following
packages contain "linux-image-2.6.21*" in their name:
  linux-image-2.6.21-2-vserver-686 linux-image-2.6.21-2-amd64
linux-image-2.6.21-2-k7 linux-image-2.6.21-2-486 linux-image-2.6.21-2-686
  linux-image-2.6.21-2-686-bigmem linux-image-2.6.21-2-vserver-k7
The following packages have been kept back:
  transcode
0 packages upgraded, 0 newly installed, 0 to remove and 1 not upgraded.
Need to get 0B of archives. After unpacking 0B will be used.
Would download/install/remove packages.



So what am I missing with dpkg?

thanks,
->HS