BuddyPress.org

Hi, I have a problem with the messaging system.
When I want compose a message to an user that is my friend, there is no problem, i write his name in the form, I select the name does appear, I write subject and message and it’s all ok.
But when I try to send a message to an user that is not yet my friend (from message —> compose)
the system doesn’t recognize his name and I can’t send the message.

There is another problem.
I am using the “BuddyPress Message Attachment” plugin that allows me to attach a file in the message. Sometimes I want only send the file, without subject and/or text but I can’t make this because the system says “Error…”
It’s possible to solve theese two problems?

I am using wordpress 3.4.2 and buddypress 1.6.1.
Thanks
Greetings