API module structure is garbled ? (slackware 7, apache 1.3.27 + php 4.3.2)

Hi,

I just compiled apache+php that way :
cd apachedir
/configure --prefix=/usr/apache --enable-module=digest --enable-module=so --
enable-module=example --enable-module=expires --enable-module=headers --enab
le-module=info --enable-module=log_agent --enable-module=log_referer --enabl
e-module=mime_magic --enable-module=unique_id --enable-module=usertrack --en
able-module=vhost_alias --libexecdir=/usr/apache/libexec/
cd ../phpdir
../configure --with-mysql=shared,/usr --enable-track-vars --enable-force-cgi-
redirect --with-gettext --enable-bcmath --disable-static --enable-discard-pa
th --enable-safe-mode --with-openssl --with-bz2 --with-pic --enable-calendar
--enable-ctype --with-gdbm --enable-dbase --enable-ftp --with-gd --enable-g
d-native-ttf --with-jpeg-dir=/usr --with-png --with-xml=shared,/usr --with-m
m=/usr --enable-trans-sid --enable-shmop --enable-sockets --with-regex=php -
-enable-sysvsem --enable-sysvshm --enable-yp --enable-memory-limit --with-ts
rm-pthreads --enable-shared --disable-debug --with-zlib=/usr --with-apache=.
../apache_1.3.27
make; make install
cd ../apachedir
make; make install

No problem during the configure, make, etc ...

Then, when I do a /usr/apache/bin/apachectl configtest ,I have that error :
Syntax error on line 205 of /usr/apache/conf/httpd.conf:
API module structure `vhost_alias_module' in file
/usr/libexec/mod_vhost_alias.so is garbled - perhaps this is not an Apache
module DSO?

Can someone tell me how to fix that ?

Seems nobody knows ...