SVN problems

Hey,

I just made a plug-in which I want to add to the repository. But I get the following error while logging in to the server, it seems that the login succeeds but the access rights are not set correctly:

Username: greenhost
Password for ‘greenhost’:
Adding trunk/INSTALLATION
svn: Commit failed (details follow):
svn: Server sent unexpected return value (403 Forbidden) in response to
CHECKOUT request for ‘/!svn/ver/491800/repress/trunk’
svn: Your commit message was left in a temporary file:
svn: ‘/home/users/sacha/ttt/repress/svn-commit.tmp’