Reverting to the stable distribution

[David Zuccaro <david05@primus.com.au>]

Hi,

I changed my sources.list from

deb ftp://ftp.au.debian.org/debian/ stable main non-free contrib
deb-src ftp://ftp.au.debian.org/debian/ stable main non-free contrib

to

deb-src ftp://ftp.au.debian.org/debian/ unstable main non-free contrib
deb ftp://ftp.au.debian.org/debian/ unstable main non-free contrib

Then I did an apt-get update, which I think has removed kde2 and
installed kde3.  The problem is kde3 won't run (I don't get any errors
it just sends me back to the login screen).

I want to revert back to the stable distribution so I changed my
sources.list to:

deb ftp://ftp.au.debian.org/debian/ stable main non-free contrib
deb-src ftp://ftp.au.debian.org/debian/ stable main non-free contrib

deb-src ftp://ftp.au.debian.org/debian/ unstable main non-free contrib
deb ftp://ftp.au.debian.org/debian/ unstable main non-free contrib

and added the following line to apt.conf:

APT::Default-Release "stable";

I then did an apt-get update, but I still don't have kde2 back and I
can't run kde3.

If I do a apt-get install kde I get the following message:

root:~>apt-get install kde
Reading Package Lists... Done
Building Dependency Tree... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.

Since you only requested a single operation it is extremely likely that
the package is simply not installable and a bug report against
that package should be filed.
The following information may help to resolve the situation:

Sorry, but the following packages have unmet dependencies:
  kde: Depends: libarts or
                libarts-alsa but it is not going to be installed or
                libarts-bin but it is not installable
       Depends: libkmid or
                libkmid-alsa but it is not going to be installed or
                libkmid-bin but it is not installable
       Depends: kdebase-audiolibs but it is not going to be installed or
                kdebase3-audiolibs but it is not installable
E: Sorry, broken packages

My question is how can I revert back to kde2?

Thanks,

David