This works with the original mesh, you have a lot of redundant keys in your file b.t.w
Graphics3D 640,480,32,2 SetBuffer BackBuffer() camera=CreateCamera() MoveEntity camera,0,0,-19 light=CreateLight(1) RotateEntity light,30,10,-20 mesh = LoadAnimMesh("mesh.b3d") ;The node with the 2nd set of animation child=FindChild(mesh,"mesh") a=ExtractAnimSeq(child,0,100,0) Animate child,1,1,a While Not KeyDown( 1 ) RenderWorld UpdateWorld Flip Wend End