[CentOS] Error on starting apache server

Fri Mar 9 14:14:00 UTC 2007
Ern jura <exjura at gmail.com>

I get the following error when starting the apache2 server, any ideas.

./httpd: error while loading shared libraries: libpq.so.4: cannot open
shared object file: No such file or directory
[root at localhost sbin]#
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