CentOS 3.7 install

Good evening,

After your suggestions, I moved to a centos 4.3 box, which
should have everything on board..

However, when I'm trying to install I'm getting this error
"Could not find mysqlclient library. Please install
mysql-devel package" which refers to mysql-devel but
this is allready installed..

"package MySQL-devel-5.0.19-0.glibc23 is already
installed"

Any idea's??

Greets,