How to install virtualbox-4.1.4 in ubuntu 11.04 fluently?

when apt-get install libqt* unmet dependency. there is a long list of unmet dependency. Where start first and any command to install virtualbox fluently?

You might want to run 'apt-get -f install' to correct these:
The following packages have unmet dependencies:
 virtualbox-4.1 : Depends: libcurl3 (>= 7.16.2-1) but it is not going to be installed
                  Depends: libqt4-network (>= 4:4.5.3) but it is not going to be installed
                  Depends: libqt4-opengl (>= 4:4.7.0~rc1) but it is not going to be installed
                  Depends: libqtcore4 (>= 4:4.7.0~beta1) but it is not going to be installed
                  Depends: libqtgui4 (>= 4:4.7.0~beta1) but it is not going to be installed
                  Recommends: libsdl-ttf2.0-0 but it is not going to be installed
                  Recommends: dkms but it is not going to be installed
                  Recommends: libhal1 (>= 0.5) but it is not going to be installed
E: Unmet dependencies. Try 'apt-get -f install' with no packages (or specify a solution).