PHP Binary Error on Ubuntu 6.06 LTS after following "The Perfect Setup" Guide

[BongoBob]

Hello everyone.

I recently followed The Perfect Setup guide for Ubuntu 6.06 LTS, and unfortunately get this during install...

Configuring extensions
checking whether to enable LIBXML support... yes
checking libxml2 install dir... no
checking for xml2-config path...
configure: error: xml2-config not found. Please check your libxml2 installation.
ERROR: Could not configure PHP
cd: error retrieving current directory: getcwd: cannot access parent directories: No such file or directory
mv: cannot stat 'binaries/aps.tar.gz': No such file or directory
mv: cannot stat 'binaries/spamassassin.tar.gz': No such file or directory
mv: cannot stat 'binaries/uudeview.tar.gz': No such file or directory
mv: cannot stat 'binaries/clamav.tar.gz': No such file or directory
mv: cannot stat 'binaries/cronolog': No such file or directory
mv: cannot stat 'binaries/cronosplit': No such file or directory
mv: cannot stat 'binaries/ispconfig_tcpserver': No such file or directory
mv: cannot stat 'binaries/zip': No such file or directory
mv: cannot stat 'binaries/unzip': No such file or directory
tar: spamassassin.tar.gz: Cannot open: No such file or directory
tar: Error is not recoverable: exiting now
tar: Child returned status 2
mv: cannot stat 'smapassassin': no such file or directory
tar: uudeview.tar.gz: Cannot open: No such file or directory
tar: Error is not recoverable: exiting now
tar: Child returned status 2
tar: Error exit delayed from previous errors
mv: cannot stat 'uudeview': No such file or directory
tar: clamav.tar.gz: Cannot open: No such file or directory
tar: Error is not recoverable: exiting now
tar: Child returned status 2
tar: Error exit delayed from previous errors
mv: cannot stat 'clamav': No such file or directory
tar: aps.tar.gz: Cannot open: No such file or directory
tar: Error is not recoverable: exiting now
tar: Child returned status 2
tar: Error exit delayed from previous errors
./setup2: line 794: ispconfig_tmp/php/bin/php: No such file or directory
ERROR: The PHP binary coming with ISPConfig does not work properly on your system! The installation routine stops here!

Any help? I'm sure that I didn't miss anything on the guide.

Thanks in advance