Change avatar buddypress

Hello,

when I try to change the avatar there is an iccue.
Avatar is shown only if the avatar before is deleted.
If I do not delete the avatar there is not automatic replacig when I upload a new avatar.

Please look at picture.

http://i255.photobucket.com/albums/hh153/mcbrandsstores/New%20Album%20Labo35/avatar_zps7b11937d.jpg

Thanks
Simone