Matlab Simulink Coupler Simulation Problem

Dear All,

I am trying to do some Matlab Cadence co simulation following the AVUM
Workshop included in Cadence Distribution.
My circuit is a very simple CMOS inverter. I am providing the Pulse
Input to the inverter from Matlab/Simulink though the coupler and
feeding back the output of the inverter to Matlab/Simulink by the
coupler.
I am noticing that whwever the square pulse is going through the
coupler from Matlab to Cadence, it is getting converted into
Triangular Pulse. And hence my circuit is not functioning properly.
How can I make it work properly?

I am using the following:

Matlab Version: R2009a
icfb version: 5.10.41.500.6.14
spectre version: 7.2.0.174.isr3
ncsim version: 08.20-s022
I am using Fixed Cell Coupler. I also tried Simulink Coupler from
Cadence analogLib. But failed in bot the cases.
I am using the option "start Matlab before AMS starts."

i suppose I am making a mistake in the Configuration Parameters of
Simulink. But I am clueless how to deal with it.

Please suggest.

Thanks and Regards,

Cheerss!!!


Debjit.