Upgrading from Etch to Lenny - aptitude ERROR

[Csanyi Pal <csanyipal@gmail.com>]

Hi,

I follow the steps from here:
http://debian.org/releases/lenny/i386/release-notes/ch-upgrading.en.html

and after I install aptitude with

aptitude install aptitude

and try to run

aptitude upgrade

I get the error message:

Illegal instruction


I can't to use aptitude anymore.

When I try to use apt-get:

apt-get update

I get the same error message:

Illegal instruction

What can I do to solve this problem?

-- 
Regards, Paul Csanyi
http://www.freewebs.com/csanyi-pal/index.htm