I found what the hell happen. Go to the option of the bluetooth on your computer and find where is sth with share use? allow to others devices found,send pics music and other files...and click it!so easy!
Same here..one day just stop.I can't send images to my windows7 laptop via bluetooth from my samsung phone..I never do sth, never change anything just stop. I try to do those but still doesn't work.:'(