مشکل با نصب دسکتاب mate در ابونتو

[htaheri121]

سلام
من میخام در ابونتو دسکتاب mate نصب کنم ولی با روش گفته شده توی این صفحه
http://wiki.mate-desktop.org/download
به مشکل خوردم و مشکلم اینه که وقتی این دستور رو میزنم
hassan@hassan-OEM:~$ sudo apt-get install mate-core
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.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
 mate-core : Depends: mate-control-center (>= 1.6.0) but it is not going to be installed
             Depends: mate-session-manager (>= 1.6.0) but it is not going to be installed
             Depends: mate-panel (>= 1.6.0) but it is not going to be installed
             Depends: mate-settings-daemon (>= 1.6.0) but it is not going to be installed
             Depends: mate-terminal (>= 1.6.0) but it is not going to be installed
E: Unable to correct problems, you have held broken packages.
این جوابو بهم میده
حتی با synapticهم مشکل حل نشد
شما فک میکنید مشکل تقصیر کیه؟