i got a new PC it's a TOSHIBA , but i can't handle raytracing with my GMA x4500HD
with 1800mb of VRam and i saw on the graphic and shader thread the x4500 have shader model 4.0 and we can handle raytrace with shader model 3.0
can anyone help me with this
PS: i have the latest driver for this and i'm on windows7

Just so you know the '+' means solved, you don't need to put it on your posts
(I edited it off just now)

As for your problem:
the GMAx4500HD isn't capable of running RayTracing due to it's processing power, rather than the shader model, the GMA series is just not fast enough to run raytracing, but RTRT is only really meant for video making anyway, it's not made to play the game with.