ok so right there that tells me that you will have to recompile php with soap.. right now yours is compiled with:
'./configure' '--with-apxs=/usr/local/apache/bin/apxs' '--prefix=/usr/local' '--with-xml' '--enable-bcmath' '--enable-calendar' '--with-curl' '--enable-ftp' '--with-gd' '--with-jpeg-dir=/usr/local' '--with-png-dir=/usr' '--with-xpm-dir=/usr/X11R6' '--enable-magic-quotes' '--with-mysqli' '--with-mysql=/usr' '--enable-discard-path' '--with-pear' '--enable-sockets' '--enable-track-vars' '--with-zlib'
you'll have to download the source package from php.net and install it... now here are some brief instructions
http://us3.php.net/manual/en/install.unix.php#install.unix.apache
you can skip steps 1,2,5,6,7,8 since those are for installing apache...
step 10 shows how to configure php... what youll want todo is:
./configure --with-apxs=/usr/local/apache/bin/apxs --prefix=/usr/local --with-xml --enable-bcmath --enable-calendar --with-curl --enable-ftp --with-gd --with-jpeg-dir=/usr/local --with-png-dir=/usr --with-xpm-dir=/usr/X11R6 --enable-magic-quotes --with-mysqli --with-mysql=/usr --enable-discard-path --with-pear --enable-sockets --enable-track-vars --with-zlib [B]--enable-soap[/B]
then follow the rest of the php installation procedure...
it know this is kinda rough but it should get you going