configure doesn't find libjpeg

Hello! I'm trying to compile PHP 4.3.0 for the first time by myself. My OS is RedHat Linux 8.0, Webserver Apache 2.0.37. I want use php as Apache-Module. This worked fine with original RedHat Version of PHP(4.2.2). I configure --with-jpeg-dir=/usr. If I do so, I get "configure error, can't find libjpeg.(a|so)" I tried "find -name libjepeg.*" and I found /usr/lib/libjpeg.so.62 /usr/lib/libjpeg.so.62.0.0 So I tried to use --with-jpeg-dir=/usr/lib but I got the same error. So I downloaded the whole jpeg-library again(from given link in php-manual), and put libjepeg.a to /usr/local/share, and tried --with-jpeg-dir=/usr/local/share, also without success(same error-message). Before each configure I deleted the php-4.3.0 DIR and extracted it again from the archiv. What could be the problem? I don't know what to do now. If I don't use --with-jpeg PHP works fine, but I need it! Thank you! kind regards, Andreas