fejl ved installation af kde

Reading Package Lists...
Building Dependency Tree...
Package kde has no available version, but exists in the database.
This typically means that the package was mentioned in a dependency and
never uploaded, has been obsoleted or is not available with the contents
of sources.list



? jeg har afinstalleret kde og prøvet at installere kde3 men da der kom dependency problemer gad jeg ikke og ville installere 2.2.2 standart igen..... hvordan læser jeg dette ?