Curve Network Trouble

I have been struggling creating a decent mountain like shape by using Curve Network. It is supposed to work and it seems easy but not working. On the image you can see the shape I tried to create but there is nothing smooth when I modeled it by pieces. Can you help me about how I can get that smooth mountain like shape?

curvenetwork_.3dm (324.3 KB)

Hello Efkan
just select one half of the bottom curve and all the upright curves. This will create half of what you want. Then select the other half of the bottom curve, the edge of the surface you have just created (curvature) along with the uprights. But it looks like you may have to do some tweeking of the upright curves.