Publishing in Windows Calendar

I'm trying to publish a personal calendar to the web from Windows Calendar -

I'd use Outlook but the 2007 Home and Student release doesn't contain it.

I have webspace that does not have the WebDAV capability on it right now

for $5/mo more than what I'm already paying (and I already pay $5/mo for the

service...) I can upgrade my package and add it.

However, I'm trying to publish to "iCal Exchange" which IS WebDAV enabled.

But - Windows Calendar won't upload it it tells me that the network path

(copied and pasted from iCal Exchange) couldn't be found.

Is there a restriction on that path that I'm not seeing? If not, how can I

get it to upload the calendar... preferably without doubling my monthly

server payment? Thanks in advance.