varnish demon error: libvarnish.so.1 not found

In order to try out varnish for an upcoming project I installed it on an ubuntu server using this tutorial: http://varnish-cache.org/wiki/InstallationOnUbuntuDapper

The build process worked without any errors, but I cant start the varnish demon. I always get the error message

varnishd: error while loading shared libraries: libvarnish.so.1: cannot open shared object file: No such file or directory

But /usr/local/lib/libvarnish.so.1 clearly exists.

How can I tell varnish to look in that directory and load the library?

UPDATE

To answer the questions of cd34

    ldd `which varnishd`

outputs:

    linux-vdso.so.2 =>  (0x00007fff0a360000)
    libvarnish.so.1 => not found
    libvarnishcompat.so.1 => not found
    libvcl.so.1 => /usr/local/lib/libvcl.so.1 (0x00007f2a6fcaf000)
    libdl.so.2 => /lib/libdl.so.2 (0x00007f2a6faab000)
    libpthread.so.0 => /lib/libpthread.so.0 (0x00007f2a6f88f000)
    libnsl.so.1 => /lib/libnsl.so.1 (0x00007f2a6f675000)
    libm.so.6 => /lib/libm.so.6 (0x00007f2a6f3f1000)
    libc.so.6 => /lib/libc.so.6 (0x00007f2a6f082000)
    /lib64/ld-linux-x86-64.so.2 (0x00007f2a6fec7000)

Do you have varnish in two places on the machine, one from a previous attempt?
-> No, varnish is only installed once

Are you using 2.1.0 which was recently released?
Yes, I am using the most recent version

From serverfault Max

• ldd `which varnishd`
  

  Where is varnish looking for the libraries? Do you have varnish in two places on the machine, one from a previous attempt? Did you specify any directory paths when you did ./configure ?

  Are you using 2.1.0 which was recently released?

  Max : Good questions and thanks for your answer, please see my edit.
  From $pageUsers[$post.author].name

• Try running sudo ldconfig to rebuild the library cache.

  Max : So easy! That did it, thank you very much!
  From rossnz

• Try running sudo ldconfig to rebuild the library cache.

  helpt me to thankz...

  From pera webbhotell