Irrlicht Engine

I think error is in my model that I created with Blender and not in the code because ninja.b3d works perfectly
sorry for spam

Hello,
I'm new with Irrlicht and I want to add skeletal animation to my model but it won't work


IAnimatedMesh* meshplayer = smgr->getMesh("player.b3d");
IAnimatedMeshSceneNode* playernode = smgr->addAnimatedMeshSceneNode(meshplayer);
playernode->setJointMode(EJUOR_CONTROL);
playernode ...