Problems on a new install sending mail to rt2

Hello,
I have a new install of RT2 2.0.8, on freebsd 4.4, everything is working
fine except when I send mail to rt@ I get a message bounced back.

Here is the error that bounces back

----- The following addresses had permanent fatal errors -----
"|/usr/local/rt2/bin/rt-mailgate --queue general --action correspond"
(reason: 255)
(expanded from: rt@rt.state.net)

----- Transcript of session follows -----
Can’t do setuid
554 5.3.0 unknown mailer error 255

Here is the mode of the rt-mailgate program

-rwxr-sr-x 1 root rt 5160 Oct 27 11:23 mason_handler.fcgi
-rwxr-sr-x 1 root rt 4654 Oct 27 11:23 mason_handler.scgi
-rwxr-sr-x 1 root rt 29650 Oct 27 11:23 rt
-rwxr-sr-x 1 root rt 8437 Oct 27 11:23 rt-mailgate
-rwxr-sr-x 1 root rt 23789 Oct 27 11:23 rtadmin
-rwxr-xr-x 1 root rt 4483 Oct 27 11:23 webmux.pl

Here is the error in my maillog

Oct 31 15:02:33 rt sendmail[46061]: f9VF2XY46060: f9VF2XY46061: DSN:
unknown mailer error 255

If you need anything more, please let me know

Thanks

Isaac Hopkins