Here is the file...I dont understand what you mean.

shapes.skp

Im modeling extra shapes for a train simulator game. Im trying to make a plow that looks like this..http://www.railpictures.net/viewphoto.php?id=194131&nseq=195 (look at the plow at the lower front of the locomotive).
The shape of the plow is a curve thats on an angle and curves even more at the ends.My problem is sketchup doesnt want to make a face on the angled curve. I really need to make this in sketchup. Any help is greatly appreciated.
Colin