I have a curve for a window casing in the shape of a square pyramid (going up a level then over and up and over...). When I select the curve window and the curve casing and extrude, all i get are horns. After messing with profile normal and all the options i can get it to a square shape, but because it came out looking like a horn there is a corner missing to complete the square. I've been at this for 2 hours now watching the same dvd over and over again please help.