Wrox ceased to exist. Therefore, there's no site, no errata, no nothing, unfortunately. I can say that probably your problem is with the date format. It must match the format on your global configuration (machine). If it doesn't work, try another one, such as dd-MM-YYYY, MM-dd-YYYY, etc. If you want to change your machine datetime format settings, you should go to the control panel, Regional and Language Options.
This was first published in February 2004