The only time I really had problems posting picture was when the pictures were too big. I use PAINT so that may or may not make a difference. When I open a picture in PAINT, the first thing I do is reduce the size. I do that by percentage, not pixels (mainly because I don't know how many pixels is good LOL) I reduce by half. In the box, it says 100, I change that to 50 (percent) and everything uploads just fine. So try reducing the size.