How can I commit code to svn.debian.org?

[Ding Honghui <hhding.gnu@gmail.com>]

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

I want to update the new upstream code for curlftpfs to svn
repository[1]. I has register as a site user at alioth.debian.org as
user hhding-guest. I tried the command[2] to check code out and
authorization failed. I tried command[3], it works for check out but I
can't commit in and error message is "Authorization failed". What should
I do so that I can update the code to the svn?

[1] http://svn.debian.org/wsvn/collab-maint/deb-maint/curlftpfs/
[2] svn co
svn+ssh://hhding-guest@svn.debian.org/collab-maint/deb-maint/curlftpfs/trunk/
[3] svn co
svn://hhding-guest@svn.debian.org/collab-maint/deb-maint/curlftpfs/trunk/
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.9 (GNU/Linux)
Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org

iEYEARECAAYFAkiX5s0ACgkQJo9Njjkvy34f3QCgxkniY0052m/iUgkAieOsSbQT
7OEAmwR1W8R+tqYZ1QS2vmmn2Brs5M8R
=KOOm
-----END PGP SIGNATURE-----