Could it posibly be that you have the seesion set to use an empty session at login?
Login & Logout settings:
On Login you may choose one of three options on what should happen when you log into KDE:
Restore previous session:
If this option is checked, KDE will save your current session's state when you logout. KDE will restore your session on the next login, so you can continue to work with a desktop just like you left it.
Restore manually saved session:
Instead of restoring KDE to the state it was when you logged out last, it will be restored to a specific state that you have saved manually.
If this option is checked, the start menu offers an additional item Leave → Save Session.
Start with an empty session:
If you choose this option, KDE will never restore sessions that it has saved.
Login & Logout settings:
On Login you may choose one of three options on what should happen when you log into KDE:
Restore previous session:
If this option is checked, KDE will save your current session's state when you logout. KDE will restore your session on the next login, so you can continue to work with a desktop just like you left it.
Restore manually saved session:
Instead of restoring KDE to the state it was when you logged out last, it will be restored to a specific state that you have saved manually.
If this option is checked, the start menu offers an additional item Leave → Save Session.
Start with an empty session:
If you choose this option, KDE will never restore sessions that it has saved.
