can not download k3b

please help me with this problem as my use of UBUNTU is limited with out K3B

You strictly need to open a Terminal from the menu Applications->Accessories->Terminal and type:

sudo dpkg --configure -a

give your user password when requested, you don't see nothing when you type it, then press enter.
-------------------------------------------------------------------

But to fully check and upgrade your system using terminal using command line,
open a Terminal from the menu Applications->Accessories->Terminal

Tip: right click with mouse on the terminal title caption and select the item "Always on Top" doing this you will force the terminal window to stay on top of the other windows and you will find very easy to copy single row from this web page into the terminal...
Something more about using the terminal https://help.ubuntu.com/community/UsingTheTerminal

Then type or better copy and paste a row a time then press enter:
(Tip: select the single row to copy then right click into the terminal and to quick paste click with middle button of mouse )

sudo dpkg --configure -a
sudo apt-get -f install
sudo apt-get --fix-missing install
sudo apt-get clean
sudo apt-get update
sudo apt-get dist-upgrade
sudo apt-get clean
sudo apt-get autoremove

give your user password when requested, you don't see nothing when you type it, then press enter.

Then to install k3b please type:

sudo aptitude install k3b

Hope this helps

Do you have all of the Multiverse and Universe software sources enabled? I always enable every software source I can which comes listed in the Software Sources by default and then I also enable the Medibuntu sources. I too use K3b exclusively as my burner and I had no problem installing it in 'Karmic.' (Helpful instructions can be found here: < http://ubuntuforums.org/showthread.php?t=766683 >.)