Zonky1234

Ok so every time I try to go into orbit around Kerbin I create a maneuver plan but when I make a circle around the planet a red line appears showing where I have to go to get into the circle. I figured if I pressed the maneuver control and burned when it said everything would line up perfectly. I always get thrown completely off course. Idk what the red means. If it means I can't do it then shouldn't it say something like that just like how it'll say no fuel?