There are problems in Amarok 2.0 in Ubuntu :(
Only work around is to use Amarok version 1.4
Therefore,Only work around is to use Amarok version 1.4
sudo apt-get install amarok
does not work. Instead use
sudo apt-get install amarok14
For further details refer - http://nomad.ca/blog/2009/apr/3/amarok-14-jaunty-ubuntu-904/