Can't Publish iCal Calender

I’d like to utilize webDAV to publish my iCal calender but am having difficulties. I’ve set up webDAV on my site via the Goodies control panel. In iCal, I’ve entered the URL given in the control panel. I also entered the log and pass that I set up. When click “publish” to up my calender, I get an error message stating:

Error: Calender could not be published. This action has been forbidden by the server.

Any ideas on how to publish my iCal calender? Also, once I’ve published the calender, do I need to install any scripts or anything to view the calender?

Thanks for the help.