error while upgrading stable->unstable

[Attila Csosz <csosz77@axelero.hu>]

Hi,

I'm trying to upgrade from stable to unstable but I've got the followin 
error message:

E: Internal Error, Could not perform immediate configuration (2) on libpam0g

How to solve this?
I've tried the "apt-get -f install" and the force-loopbreak option but 
nothing happened.

Thanks
Attila