Ubuntu :: Language-pack-en Failed To Upgrade?

I am using since from last septmber Ubuntu 8.04 LTS which I keep update through Update Manager on daily basis, I am a beginner with Linux systems. Today Update Manager offered 9 updates but one of them, language-pack-en can't be selected from the list and can't be upgraded. If I try to install it manually from terminal session (sudo apt-get install language-pack-en) I get this message :

Quote:

fabrizio@fabrizio-desktop:~$ sudo apt-get install language-pack-en
Reading package lists... Done
Building dependency tree
Reading state information... Done

Some packages could not be installed. This may mean that you have requested an impossible situation or if you are using the unstable distribution that some required packages have not yet been created or been moved out of Incoming.

Since you only requested a single operation it is extremely likely that the package is simply not installable and a bug report against that package should be filed. The following information may help to resolve the situation:

The following packages have unmet dependencies:

language-pack-en: Depends: language-pack-en-base (>= 1:8.04+20100117) but 1:8.04+20090105 is to be installed
E: Broken packages
fabrizio@fabrizio-desktop:~$

I reinstalled with Synaptic language-pack-en-base and it seems to be updated to last version 8.04+20090105