Fresh Ispconfig Installation On Debian Etch

General settings
checking whether to include gcov symbols... no
checking whether to include debugging symbols... no
checking layout of installed files... PHP
checking path to configuration file... /root/ispconfig/php
checking where to scan for configuration files...
checking whether to enable safe mode by default... no
checking for safe mode exec dir... /usr/local/php/bin
checking whether to enable PHP's own SIGCHLD handler... no
checking whether to enable magic quotes by default... no
checking whether to explicitly link against libgcc... no
checking whether to enable short tags by default... yes
checking whether to enable dmalloc... no
checking whether to enable IPv6 support... yes
checking how big to make fd sets... using system default

Configuring extensions
checking whether to enable LIBXML support... no
checking libxml2 install dir... no
checking for OpenSSL support... yes
checking for Kerberos support... no
checking for DSA_get_default_method in -lssl... no
checking for pkg-config... no
configure: error: Cannot find OpenSSL's <evp.h>
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
tar: Error exit delayed from previous errors
mv: cannot stat `spamassassin': 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 888: 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!
I have php PHP 5.2.0-8+etch11 (cli) (built: May 10 2008 10:35:46)
Copyright (c) 1997-2006 The PHP Group
Zend Engine v2.2.0, Copyright (c) 1998-2006 Zend Technologies installed;

what can be the problem and how do i proceed with installation?