Problem with WebDAV and iCal

I'm trying to set up iCal to publish to 127.0.0.1/ical so that the events can show up in Thunderbird/Lighting. I found directions for enabling WebDAV in Leopard and followed accordingly. I set up .htpasswd by using http://www.htaccesstools.com/htpasswd-generator/ to generate the user name and password, and then copy/pasted into /Library/WebServer/Documents/ical/.htpasswd.

When I try to publish my calendar, I get this error message:

Authentication with server failed ( http://lolajl@127.0.0.1/ical/Personal.ics). Please check your login and password information.

Any ideas what's going wrong?

In httpd-dav.conf I have:

Code:
DavLockDB "/Library/WebServer/DavLocks/DavLock"

DAVMinTimeout 600
DAVDepthInfinity On

Alias /ical "/Library/WebServer/Documents/ical"
<Directory "/Library/WebServer/Documents/ical">
DAV On
AllowOverride AuthConfig
AuthName "DAV Restricted"
AuthType Basic
AuthUserFile /Library/WebServer/Documents/ical/.htpasswd
<Limit PUT POST DELETE PROPFIND PROPPATCH MKCOL COPY MOVE LOCK UNLOCK>
Require lolajl
</Limit>
</Directory>

Permissions:

/Library/WebServer/DavLocks:
drwxr-xr-x 2 _www _www 68 Apr 7 06:13 DavLocks/

/Library/WebServer/Documents/ical:
drwxr-xr-x 3 _www _www 102 Apr 7 06:31 ical/

Error message from apache2/error_log:

[Mon Apr 07 07:06:07 2008] [error] [client 127.0.0.1] access to /ical/Personal.ics failed, reason: require directives present and no Authoritative handler.