message "unsupported content"

I restored my Ativ S to factory settings.

When I open Message Box I can se all my sms and mms in a thread. I can also receive a mms and I can se on the Picture, but if I click on the Picture is answers "Unsupported content" "We don't currently support this type of media file".

If i Write a New Message and presses + on the right side og "To:" the Message Box just Closes.

If i Write a New Message and add a Picture, it goes back to the Message, but the Picture isn't added.

The strange part is that I receive mms messages, but I cannot send any.

Do anyone have any tips or hints about this?

Is it a .gif?

Maybe? Strange is that I see the mms image inn the thread, but cannot open the picture.

I know this message is about two years old, but did you ever figure it out? The same is happening to me!