join points in a line chart (Power View)

I have a issue with Power View and i hope that some one can help me

This is the question: I have a graph with three series, but the line chart don't show me a solid line.

I see a series of separates points and incomplete lines. The position and the value of the points is correct but i need that this points can unite themselves in a continuos polyline

Somebody know how i can do that?

I appreciate very much if someone can tell me

Thanks you in advance!