Gravity Problem

Hello im using Buggyswires and i have the problem that gravity doesnt seem to work because the bodies stand still in the scene without falling, i've tested adding forces to see if the problem was rendering but the forces seem to work, i'll post here my code for createScene function

void createScene()
{
mWorld = NxOgre::World::createWorld();
NxOgre::SceneDescription sceneDesc;
sceneDesc.mGravity = NxOgre::Constants::MEAN_EARTH_GRAVITY;
sceneDesc.mUseHardware=false;
mScene = mWorld->createScene();
mScene->getMaterial(0)->setAll(0.1,0.5,0.5);
mRenderSystem = new Critter::RenderSystem(mScene,mSceneMgr);
NxOgre::BoxDescription boxDesc(3);
Critter::BodyDescription bodyDesc;
bodyDesc.mMass=15.0f;
Critter::Body* bHead = mRenderSystem->createBody(boxDesc,NxOgre::Matrix44::IDENTITY,"ogrehead.mesh",bodyDesc);
bHead->setGlobalPosition(0,200,0);
bHead->addLocalForce(NxOgre::Vec3(-8000,0,0));
mScene->createSceneGeometry(NxOgre::PlaneGeometryDescription());
}

You haven't passed your scene_desc into the scene creation method

Thank you very much ^^ that solved my problem hehehe i really didnt see that problem and i read like 5 times my code xD!!! lol