apt-get -f install error
 

hi i am new to linux and have installed paipix and now iam trying to get kpackage to work but when i run # apt-get -f install i get this:
Reading package lists... Done
Building dependency tree... Done
Correcting dependencies... Done
The following extra packages will be installed:
capiutils ipppd isdnactivecards isdnlog isdnlog-data isdnutils
isdnutils-base isdnutils-xtools isdnvboxserver libcapi20-3 libcapi20-dev
libice-dev libice6 libqt3-headers libqt3-mt libqt3-mt-dev libxft-dev libxft2
pppdcapiplugin qt3-dev-tools x11-common x11proto-core-dev xbase-clients
xbitmaps xfonts-encodings xfonts-utils xserver-xorg xserver-xorg-core xterm
xutils xutils-dev
Suggested packages:
pdnsd isdnutils-doc isdneurofile libqt3-mt-psql libqt3-mt-mysql
libqt3-mt-odbc libqt3-i18n qt3-doc mesa-utils libglide2 xfonts-cyrillic
pdksh
Recommended packages:
libgl1-mesa-glx libgl1 libglu1-mesa libglu1 libqt3-compat-headers
laptop-detect xresprobe mdetect discover1 discover
The following packages will be REMOVED:
xserver-common xvfb xvkbd
The following NEW packages will be installed:
x11proto-core-dev xbitmaps xfonts-encodings xfonts-utils xserver-xorg-core
xutils-dev
The following packages will be upgraded:
capiutils ipppd isdnactivecards isdnlog isdnlog-data isdnutils
isdnutils-base isdnutils-xtools isdnvboxserver libcapi20-3 libcapi20-dev
libice-dev libice6 libqt3-headers libqt3-mt libqt3-mt-dev libxft-dev libxft2
pppdcapiplugin qt3-dev-tools x11-common xbase-clients xserver-xorg xterm
xutils
25 upgraded, 6 newly installed, 3 to remove and 1571 not upgraded.
50 not fully installed or removed.
Need to get 0B/15.7MB of archives.
After unpacking 10.9MB disk space will be freed.
Do you want to continue [Y/n]? y
Extracting templates from packages: 100%
Preconfiguring packages ...
(Reading database ... 242669 files and directories currently installed.)
Unpacking xserver-xorg-core (from .../xserver-xorg-core_2%3a1.1.1-10_i386.deb) . ..
dpkg: error processing /var/cache/apt/archives/xserver-xorg-core_2%3a1.1.1-10_i3 86.deb (--unpack):
trying to overwrite `/etc/X11/xserver/SecurityPolicy', which is also in package xserver-common
Errors were encountered while processing:
/var/cache/apt/archives/xserver-xorg-core_2%3a1.1.1-10_i386.deb
E: Sub-process /usr/bin/dpkg returned an error code (1)


can anyone help thanks??

What distro are you running?

Can you post your /etc/apt/sources.list file? To me the lines imply that you're running mixed sources and that usually causes problems.