Hi John , its because your pics might need resizing pal.
The easiest way to do this is upload it into photo-bucket or similar then when you have the picture up on the screen move the cursor and right click on the mouse and save it back to a file in your computer
All you have to do then is the upload pics to my album but use the images you have just re-sized and it will upload no problem pal.
Give it a go mate


