[ubuntu] could not upgrade anything in ubuntu 10.04 LTS

Since long time I am using ubuntu 10.04 LTS,
Because of some problems I decided to upgrade to 12.04 LTS but I could not. Now I am trying to upgrade the packages.
For any package it always give the same error and then ubuntu crash.

I tried many things to solve dpkg error but it does not help
Thanks in advance

Setting up linux-image-2.6.32-47-generic (2.6.32-47.109) ...
dpkg (subprocess): unable to execute installed post-installation script: Exec format error
dpkg: error processing linux-image-2.6.32-47-generic (--configure):
subprocess installed post-installation script returned error exit status 2
Setting up libpackagekit-glib2-12 (0.5.7-0ubuntu2.2) ...

Setting up packagekit (0.5.7-0ubuntu2.2) ...

Processing triggers for libc-bin ...
ldconfig deferred processing now taking place
/sbin/ldconfig.real: /usr/lib32/libstdc++.so.5 is not a symbolic link

Errors were encountered while processing:
linux-image-2.6.32-47-generic
E: Sub-process /usr/bin/dpkg returned an error code (1)
A package failed to install. Trying to recover:
Setting up linux-image-2.6.32-47-generic (2.6.32-47.109) ...
dpkg (subprocess): unable to execute installed post-installation script: Exec format error
dpkg: error processing linux-image-2.6.32-47-generic (--configure):
subprocess installed post-installation script returned error exit status 2
Errors were encountered while processing:
linux-image-2.6.32-47-generic