I can't open your part (still back on 2010), so all I can do is guess, based on my own experiences. I suspect that you have more than one open contour. Zoom to the extents and see if there are any extra sketch elements floating around. If that doesn't show anything, check to see if your contour has a gap somewhere. Try select chain from either end and make sure it picks the whole contour.
There is no problem with sketch3. The problem is with Sketch7. If you zoom in really close, you see that Sketch 7 does not intersect Sketch3. Because of the order of the sketches, you have to edit 7 to fix the problem, and you should probably do it with a Pierce relation rather than a dimension.
In Boundary, all the Dir1 sketches have to intersect all the Dir2 sketches.
Best of luck.