Install problems, re libphp4.so and libpq.so.2 on RH 7.0

I've been setting up a new RH 7.0 Linux machine. I installed the current Apache, got it to work for static pages. Tried to install PHP 4.0.6, got through configure (--with-apxs --with-pgsql=blah --enable-trans-sis) / make/make install with no problems. checked out the httpd.conf file, nothing required manual changes. apachectl restart however gives the following error message (sorry its not exactly verbatim, work currently had no network access) syntax error in httpd.conf on line 205 (line involving libphp4.so) can not open libpq.so.2 find . libpq.so.2 as root at / yields no matches. Can anyone give me any advice/tell me where to look for a FM to read? Thanks eric