Parallel Forcite Run-time on a Unix server

Dear all,

I am trying to use a supercomputer under Unix system to run a Frcite -plus which is a parallel code but when I increase the number of CPUs  from 8 CPUs to 32 CPUs, total run time getting about half of the past, while it should  get to  0.25

It will be apreciated if you have any suggestion to improve the performance.

Regards

Saeed