Amarok could not find any collection plugins.

[Guest]

Amarok could not find any collection plugins. Amarok is now updating the KDE configuration database. Please wait a couple of minutes, then restart Amarok.
If this does not help, it is likely that Amarok is installed under the wrong prefix, please fix your installation using:
$ cd /path/to/amarok/source-code/
$ su -c "make uninstall"
$ ./configure --prefix=`kde-config --prefix` && su -c "make install"
$ kbuildsycoca4 --noincremental
$ amarok

after fresh installation of amarok-kde4 package

64 bit kubuntu , kde 4.2 Beta.

may i update db manually somehow or problem is elsewhere ?