Access rights based on groups

Hello

I have set up a svn repository on a server, on which all the users which
should have read/write access is divided in five groups, I have tried to
change the access by using setfacl and ended up with something like this

getfacl DIRECTORY
# file: DIRECTORY
# owner: USER
# group: GROUP
user::rwx
user:USER:rwx
group::rwx
group:GROUP1:rwx
group:GROUP2:rwx
group:GROUP3:rwx
mask::rwx
other::---

This works fine at first, but when one my group commit, everybody from all
other groups are no longer allowed to commit, why could this be? Could it be
something with the rights in repository/db?

Maybe I should mention that the server is at my university, so there are
things I do not have access to change, and that the connection to the server
is done via ssh

-- 
Med venlig hilsen / Kind regards
Søren Juul