dist-uprgrade

[Demented Blitz]

I just finished installing debian woody following branden's without any media install and proceeded to do edit /apt/sources.list edited to unstable and did apt-get update then dist-upgrade but i get this following message.. I know you guys probbably ecountered it and sorry for my newbieness. Uh it says:   This instllation run will require temporarily removing the essential package libpam-modules due to a conflict/rpre depends something... this is oftern bad, but if you really want to do it, activate the APT::Force-LoopBreak option.   any help? suggestions to what to do? thanx in advance for ALL the help since my last 3 posts.