[Xfce-i18n] svn: Commit failed, svn: Can't create directory /var/svn/...

[Sylvain Vedrenne (Xfce)]

Hi,

After successfully checking out the svn using
  % svn co https://gnu_sylvain@svn.xfce.org/svn/xfce/modules/trunk-po
I'm trying to update a .po file, but I'm getting the error below.

I added the required privileges on my local system, but I still get the 
same error.
So I'm wondering: is my svn committer access gone?
More probably I did something wrong, but I can't figure it out.
What am I doing wrong here?

=== error message below:

sylvain at tanuki:~/svn_xfce/trunk-po/xfcalendar/po$ svn ci eo.po
svn: Commit failed (details follow):
svn: Can't create directory '/var/svn/xfce/db/transactions/24525-1.txn': 
Permission denied
svn: Your commit message was left in a temporary file:
svn:    '/home/sylvain/svn_xfce/trunk-po/xfcalendar/po/svn-commit.7.tmp'

Please help. Thanks in advance.
Regards,