apt-get error

Hello
when i am giving a command apt-get install

I am getting error as below:

" apt-get: error while loading shared libraries: libapt-pkg-libc6.3-6.so.3.11: cannot open shared object file: No such file or directory "

can u suggest what to do.
step by step.

In my opinion you need to install libapt-gkg-libc6 at frist.
Download.deb format here:
http://http.us.debian.org/debian/pool/main/a/apt-rpm/libapt-rpm-pkg-libc6.3-6-2\_0.5.15lorg3.2-1_i386.deb

Maybe use the dpkg command to reinstall or reconfigure your apt-tools to make sure they get all dependencies.

apt-get install libc6 libc6-dev

Also try apt-get clean