Win XP - Proff - RAM shortage upon reaching 2GB

Hey hi,

i am working on a 4core machine with around 4 gb of ram. The boot.ini switch is on (DEP or EAP) enabling windows to discover and allow me to use around 3.6 GB of RAM. Upon running a simulation though with flow simulation while monitoring RAM usage, I get a RAM shortage error from the software upon trying to use around 2GB or RAM. Any ideas how to overcome this?

Thanks

SolidworksFlow Simulation