Ubuntu-desktop cannot be installed ..!!!!

Ubuntu-desktop cannot be installed ..!!!! -- Linux general technology-Linux technology and application information. For details, refer to the following section. After sudo apt-get install ubuntu-desktop, the following displays:


Reading the package list... complete
Analyzing the dependency tree of the software package
Reading status information... complete
Some software packages cannot be installed. If you are using the unstable release, this may be
This is because the system cannot meet your requirements. This version may contain software you need.
Packages have not yet been created or they have been removed from the new Incoming directory.
The following information may help solve the problem:

The following software packages have dependencies that are not met:
Ubuntu-desktop: Dependency: usplash, but it will not be installed
Dependency: usplash-theme-ubuntu, but it will not be installed
Recommendation: espeak, but it will not be installed
Recommended: f-spot, but it will not be installed
Recommended: gimp but it will not be installed
Recommended: gnome-orca, but it will not be installed
Recommended: ibus-m17n but it will not be installed
Recommended: indicator-messages, but it will not be installed
Recommendation: speech-dispatcher, but it will not be installed
E: damaged Software Package



, Help me see what the problem is !!!!!!!!!!!!!!!