http://cvs.php.net/co.php/phpdoc/howto/howto.html.tar.gz doesnt work

I can gunzip this file but when I try to extract the tar file it gives me an error: "error reading header after processing 0 entries" Under W2k, Winzip 8.1 beta Any ideas - is it me or the archive? N ********************************************************* Nico Morgan, Clickstream Technologies PLC www.clickstream.com Phone: +44 (0) 1223 233799 Fax: +44 (0) 1223 233818 Email: nico.morgan@clickstream.com This email and any attachments are confidential, legally Privileged and protected by copyright. If you are not the intended recipient dissemination or copying of this email is prohibited. If you have received this email in error, please notify the sender by replying by email and then delete the email completely from your system. It is the responsibility of the recipient to conduct their own security measures and no responsibility is accepted by Clickstream Technologies Plc for loss or damage arising from the receipt or use of this email. No responsibility is accepted by Clickstream Technologies Plc for personal emails or emails unconnected with the company's business.