System Requirements shown on game boxes are eternally optimistic - I am looking at a copy of FS2004 which boldly states that I need a 450mhz processor and 8mb of graphics memory. Now FS2004 is a brilliant simulator, but not on a machine with those specs - it would be truly dire. I run on 3.2Mhz with 128mb of graphics and it can still stutter with its' frame rates on occasion! Forget the specs on the box - they are minimum. Laptops are not known for their graphics ability.
What can you try? Make sure that you've got the latest driver installed for your graphics card. That's about it for a laptop without spending serious money which would be better spent on a new machine. Don't expect miracles.