problem with spline modeling

[ashik]

yesterday i was modeling car using spline. after completing the network of splines i align them after the other blueprints. than i create additional splines to create surfaces of 3 or 4 splines. After finishing the spline network i make a reference of the spline network and apply to the reference the surface modifier (the original object remains without surface). but here is the problem, i am not getting the original surface. after surfacing i becomes a melted model. i dont khow why i am getting this.