Group Email bad url in "sent from group..."

The email sends you to that adress
http://www.basqueose.org/groups/e-bete/
when the right one is
http://www.basqueose.org/proiektuak/e-bete/

Due to languages, we change de default buddypress page for groups. The url from where you write the group email, in our case, is
http://www.basqueose.org/proiektuak/e-bete/email/

Can it be solved?