Rt-mailgate error -- 302 found?

Hello,

I have a fresh installation of RT3.4 on Ubuntu 6.06 and am having problems
with rt-mailgate processing incoming emails. I see these types of error
messages in the /var/log/mail.log:

Oct 9 15:40:46 helpdesk postfix/local[6290]: D0EC1682B9:
to=help@helpdesk.foo.com, relay=local, delay=1, status=deferred
(temporary failure. Command output: An Error Occurred =================
302 Found )

My /etc/aliases file is configured with these entries for rt-mailgate:

help: "|/usr/bin/rt-mailgate --queue general --action correspond --url
http://helpdesk.foo.com/"
help-comment: “|/usr/bin/rt-mailgate --queue general --action comment
–url http://helpdesk.foo.com/

My /etc/request-tracker3.4/RT_SiteConfig.pm file is configured for these
two email addresses:

Set($CorrespondAddress , ‘help@helpdesk.foo.com’);
Set($CommentAddress , ‘help-comment@helpdesk.foo.com’);

Does anyone know how I might go about fixing this “302 Found” error
generated by rt-mailgate?

–burke