BB Bold 9700 :: Messenger - Send Some Images Or Files - Change Option

1: when i send some images or files, i always have to wait that the receiver accept the file... how can we change this option... and go back with the old style? I understood that this is a "problem" of the new version of BB messenger.

If i send an image to a contact who still have an old model (es BB 8300) with the old software, on my phone is displayed "file sent" straight, without any wait. Instead if i send an image to someone who has a new software, i have to choose the size of the image, and wait for his acceptance. And i also saw that if a contact doesn't accept the file immediately, after some time (really i cannot say how many time), there is a kind of time out of the sending (displayed on his phone)...how is it possible (on my phone was always displayed "waiting for acceptance")? How can i cancel this option?

2: with the old software if someone didn't read a message, a clock appeared on the face of the contact, and then i usually set the advice, to know when he read the message thanks to the sound. With the new software instead, i saw you can just set the advice only if the contact is Unavailable.