I didn't want to post this yet, but since I need a little assistance, it seems I have to...

It's a model of my new phone, a Nokia 7710, and my first real attempt at modeling in NURBS. So far they haven't caused me as much trouble as I'd thought they would, but I've had to start over a few times already

On to the problem. While working on the back of the phone, I need to create a surface from the two curves in the attached pic. I've tried cutting the round parts from the planar in the big curve, and then using Birail and Planar to create two seperate surfaces, but in my test render you can see that it's seperate pieces.

Can anyone tell me how to create the surface from the two original curves, or how to attach the two surfaces or somehow make the split invisible?

The red circles show the non-planar part of the curve...