Lubuntu Taskbar missing

I have recently installed Lubuntu 14.04 but when I start my computer and logs in the only thing I see is my wallpaper and my trashcan.

Lubuntu worked fine when I tried it before installing but now I cant see the taskbar. If I login as guest the taskbar is there.

I also gets a message that says:

Failed to set new theme
Failed to create file '/home/<username>/.cache/xfce4-notifyd-theme.rc.Z095SX': Permission denied

The six last letters and numbers in uppercase seems to be different every time.

Thanks for help :)

Solution 1:

Ctrl + Alt + t will give you a terminal. Once you have terminal enter sudo synaptic You will be asked for your password. Enter it. The curser will not move. Hit enter. This should start the Synaptic Package Manager. Search for LXPanel and then mark lxpanel for re-installation. Hit apply. Hope that helps.