mod_auth_plain and Tomcat - getRemoteUser

[schmen]

Platform: windows xp
Apache Version: 1.3
Tomcat: 4.01

I am securing by Location, and all is working as expected, this is my Apache
http.conf entries...

LoadModule plain_auth_module modules/mod_auth_plain.so

<IfModule mod_auth_plain.c>
<Location /plaintest>
AuthName "Enter isid / password"
AuthType Basic
AuthPlainUserFile C:/Apache_1_3/Apache/conf/plain.htpasswd
<Limit GET POST>
Require valid-user
</Limit>
</Location>
</IfModule>

This is a two part question..

1) My Tomcat hosted servlet is returning null for .getRemoteUser(),
after I authenticated - via jk_mount. Any ideas?

2) Where can I find the binary for mod_auth for 1.3? I found as part
of the distribution of Apache 2.0, but can't seem to run in 1.3 (I'm
sure by design).

Any help would be appreciated.
Thanks,
- schmen