Processor limitation simulation errors

We have been trying to run a simulation on a large rack for acouple of weeks now and have had nothing but problems. Our hardware specs are as follows:

Dell T5400
Intel Zeon Quad E5430 2.66Ghz
16 Gig Ram
64 bit vista

During the meshing phase if you look at the task manager theprocessor is limited to 13%. It has never gone above this no matterwhat size model we try. Are dealer has not been able to figure thisout. This is our largest customer and they are not happy with us atthe moment.

Can anyone help?SolidworksSimulation