thX "ivyking"
The repositories that i have enabled are : fremantle ssu apps, fremantle ssu mr0, fremantle1.2 ovi. --> i'am not sure but i think that they have been enabled after that i made the update.
and yes i tried apt-get -f install and this is what i get ! :

Reading state information... Done
You might want to run `apt-get -f install' to correct these:
The following packages have unmet dependencies:
openssh-client: Depends: openssh-common but it is not going to be installed
openssh-server: Depends: openssh-common (= 1:5.1p1-6.maemo5) but it is not going to be installed
qtwrt: Depends: wrt (= 1.1.0) but it is not going to be installed
Depends: wrt-api (= 1.1.0) but it is not going to be installed
E: Unmet dependencies. Try 'apt-get -f install' with no packages (or specify a solution).