Need help in Vivaldi simulation (Urgent!)

Hi... I have done this Vivaldi design but i'm unable to get a valid simulation result for the S11 and VSWR. I'm using Ansoft HFSS v10 for the designing and simulation. I have a feeling that i might not be doing the simulation properly.

I've attached my design file below. Can someone pls help me simulate it and let me know where i have gone wrong? I really can't figure out the problem. The frequency is suppose to sweep between 0.2 to 2GHz.

Thank u so much!!

my hfss is not currently working. you can also ask at http://www.emtalk.com

Thanks savedadogs. I'l try to post this there as well.

Hi freek,
first your simulation is not converged, you should change your number of passes to 10 or 20 (I tried a good point at 12) for the convergence of simu,
second you have not the plan of mass, I think that it is better to add it ..