I am installing OTRS on a Sun machine running Solaris 5.8. I've got mysql up and running as well as apache2. I've followed all the installation instructions for OTRS on a UNIX system. When I try to run installer.pl from the web page (http://hostname/otrs/installer.pl) in Internet Explorer I get the following error in Apache's error log:

cat error_log
[Thu Sep 13 11:07:52 2007] [error] [client 130.170.246.72] Can't locate Kernel/Config/Defaults.pm in @INC (@INC contains: /opt/otrs/bin/cgi-bin/../../Kernel/cpan-lib /opt/otrs/bin/cgi-bin/../.. /usr/local/lib/perl5/5.8.8/sun4-solaris /usr/local/lib/perl5/5.8.8 /usr/local/lib/perl5/site_perl/5.8.8/sun4-solaris /usr/local/lib/perl5/site_perl/5.8.8 /usr/local/lib/perl5/site_perl .) at /opt/otrs/bin/cgi-bin/../../Kernel/Config.pm line 92.
[Thu Sep 13 11:07:52 2007] [error] [client 130.170.246.72] BEGIN failed--compilation aborted at /opt/otrs/bin/cgi-bin/../../Kernel/Config.pm line 92.
[Thu Sep 13 11:07:52 2007] [error] [client 130.170.246.72] Compilation failed in require at /opt/otrs/bin/cgi-bin/installer.pl line 38.
[Thu Sep 13 11:07:52 2007] [error] [client 130.170.246.72] BEGIN failed--compilation aborted at /opt/otrs/bin/cgi-bin/installer.pl line 38.
[Thu Sep 13 11:07:52 2007] [error] [client 130.170.246.72] Premature end of script headers: installer.pl

cat error_log
[Thu Sep 13 12:51:28 2007] [error] [client 130.170.246.72] Can't locate Kernel/System/Web/InterfaceAgent.pm in @INC (@INC contains: /opt/otrs/bin/cgi-bin/../../Kernel/cpan-lib /opt/otrs/bin/cgi-bin/../.. /usr/local/lib/perl5/5.8.8/sun4-solaris /usr/local/lib/perl5/5.8.8 /usr/local/lib/perl5/site_perl/5.8.8/sun4-solaris /usr/local/lib/perl5/site_perl/5.8.8 /usr/local/lib/perl5/site_perl .) at /opt/otrs/bin/cgi-bin/index.pl line 41.
[Thu Sep 13 12:51:28 2007] [error] [client 130.170.246.72] BEGIN failed--compilation aborted at /opt/otrs/bin/cgi-bin/index.pl line 41.
[Thu Sep 13 12:51:28 2007] [error] [client 130.170.246.72] Premature end of script headers: index.pl