Problem with Momentum Simulation Time

Hi,

I created an Wilkinson Power Divider ( 1->8 ) with several Wilkinson Stages. There is no problem in S-Parameter Simulation with ADS.
But the Momentum(Layout) Simulation takes a lot of time (hours...). Is there any way to reduce Simulation Time? The Wilkinson Divider was created with the ADS Passive Design Guide.

Thanks a lot

Florian