yum not updating kernel on rh7.3?

["v b" <vuvis hotmail com>]

I'm a little confused. I followed the instructions to make use of yum on my 
rh7.3 server as published at: http://fedoralegacy.org/docs/yum-rh7x.php and 
it has updated some packages correctly (ie; elm, ethereal), but does not 
grab the recent kernel update. I've tried various mirrors, but that doesn't 
seem to help.  I'm currently running kernel-2.4.20-28.7. I'm sure it's 
something simple I'm missing.

vb

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