dependency problem with dpk

[Philipp Bliedung <philipp.bliedung@bliedung.de>]

Hey

I don't know how to fix this:
I installed the new libc6 version (2.2.1-1) on my potato box. So far
everything went fine, but when I tried to add other packages using dpkg
I get this:

Reading Packae Lists... Done
Building Dependency Tree ... Done
You might want to run 'apt-get -f install' to correct these.
Sorry, but the following packages have unmet dependencies:
    libc6-dev: Depends: libc6 (=2.1.3-10) but 2.2.1-1 is installed
    locales: Depends: libc6 (=2.1.3-10) but 2.2.1-1 is installed
E: Unmet dependencies. Try using -f

But when I use 'apt-get -f install' I get this:

#apt-get -f  install
Reading Package List .... Done
Building Dependency Tree ... Done
Correcting dependencies ... Done
The following packages will be REMOVED:
    atlas2-dev blas-dev blt-dev g++ lam2-dev libc6-dev libgc5-dev
    libgimp1.1.17-dev libgtk1.2-dbg lingtk1.2-dev libncurses5-dev
    libstdc++2.10-dev locales task-parallel-computing-dev task-tcltk-dev

    task-x-window-system tcl8.2-dev tk8.2-dev tktable-dev xlib6g-dev
0 packages upgraded, 0 newly installed, 20 to remove and 0 not upgraded.

yada... yada... yada...
Abort.

I also downloaded the libc6-dev package which it says it depends on but
when I install this it, it again depends on g++, etc...
Would it be possible to add the testing directories to my sources.list
and get all the packages with apt-get from the Debian server? Would
'apt-get upgrade' work then? I don't want to upgrade to testing
completely (!!) but I want the blic6 package work !
What can I do?
When I downgraded to the 'old' version of libc6 (2.1.3-10) dpkg broke
and I couldn't do anything b/c no libc6 package was correctly installed
and I don't want to mess up b/c I'm not so comfortable with dpkg and
apt-get!
That's why I'm still using potato   :)

TIA !!!
Philipp