Errors with pkg_add

[Phusion]

I am running FreeBSD 7.0-STABLE i386 and am having problems with
pkg_add. I can install packages as the root user without problems.

- pkg_add -r packages, works when running as root
- pkg_add -r packages, errors out when using sudo

% sudo pkg_add -r openssl
Error: FTP Unable to get
ftp://ftp4.us.freebsd.org/pub/FreeBSD/ports/i386/packages-7-stable/Latest/openssl.tbz:
Syntax error, command unrecognized
pkg_add: unable to fetch
'ftp://ftp4.us.freebsd.org/pub/FreeBSD/ports/i386/packages-7-stable/Latest/openssl.tbz'
by URL

% cat /usr/local/etc/sudoers
Defaults        env_keep += "PKG_PATH PKG_DBDIR PKG_TMPDIR TMPDIR
PACKAGEROOT PACKAGESITE PKGDIR"
Defaults        env_keep += "PORTSDIR PORTS_INDEX PORTS_DBDIR PACKAGES
PKGTOOLS_CONF"
root    ALL=(ALL) ALL
%wheel  ALL=(ALL) NOPASSWD: ALL

This user is a member of the wheel group so no password is required.
Both this user and root user are using the csh with the following in
.cshrc.

setenv  PACKAGESITE
ftp://ftp4.us.freebsd.org/pub/FreeBSD/ports/i386/packages-7-stable/Latest/

Let me know if you have any ideas. Thanks.

Phusion