Where's the Groun Plane?

I am at a loss. I am trying to use the CreatePlane command, and assign a texture to it. But... it doesn't show up. Here's the code.

;Barebones 3D Dungeon V.006.2  12-22-2005

Graphics3D 800,600 
SetBuffer BackBuffer() 

camera=CreateCamera() 
light=CreateLight() 

plane=CreatePlane()
grass_tex=LoadTexture( "media/mossyground.bmp" ) 
EntityTexture plane,grass_tex

;floor mirror
;m=CreateMirror(plane)

Gosub createdoorframe
While Not KeyDown(1) ;ESCape key
	RenderWorld 
	Flip 
Wend 
End

.createdoorframe
	doorframe	=CreateCube()		;create a cube
	ScaleMesh doorframe,.5,2,.5 ;reshape it into a doorpost column
	doorframe2	=CopyMesh(doorframe) ;copy the doorpost column
	topframe	=CopyMesh(doorframe)
	ScaleMesh topframe,2,.125,1

	doorpivot=CreatePivot()
	door=CreateCube(doorpivot)
	PositionMesh door,1,1,1 ;move "door" so that it hinges on left side
	PositionEntity doorpivot,-1,-1.75,-.25 ;position pivot so it stands inside doorframe
	ScaleMesh door,1,1.75,.2 ;reshape cube to look like door (flatten, etc)

	PositionMesh doorframe,0,0,4 
	PositionMesh topframe,1.5,1.75,4
	PositionMesh doorframe2,3,0,4 
	AddMesh topframe,doorframe
	AddMesh doorframe2,doorframe
	FreeEntity topframe
	FreeEntity doorframe2
	TranslateEntity door,1.5,-.25,4
	EntityParent door,doorframe
	TranslateEntity doorframe,-1.5,0,5
Return

I've trimmed out a lot of code that doesn't directly bear on this problem. The "media/mossyground.bmp" is one that comes with Blitz3D. Why won't the plane show up?

move your camera up a smidge... it's at zero. sort of like looking at a sheet of paper from the edge... can't see the top or bottom.

positionentity camera,0,1,0

Thanks, that did the trick!