thank you nicolai, but im not trying to update conversations plugins, the first pic is saying that there are 4 packages missing which i downloaded them manually..and the remaining package is hildon-desktop ! and thats when i typed apt-get upgrade :

he following packages have been kept back:
hildon-desktop
0 upgraded, 0 newly installed, 0 to remove and 1 not upgraded.
2 not fully installed or removed.
After this operation, 0B of additional disk space will be used.
Do you want to continue [Y/n]? y
Setting up account-plugin-salut (0.10) ...
dpkg (subprocess): unable to execute post-installation script: Exec format error