Cosmos on Xeon Single vs Quad

I was using Cosmos with a Xeon 3.0 single core for the lasttwoyears,  I just started using a Xeon 2.33 Quad core. nowits SLOW  SLOW  SLOW  I mean things thatwould takethe single core about 1/2 sec to compleat takes 45sec ormore now, why????SolidworksSimulation