[Bf-python] NMesh module :problem when i try to link a uv material to a mesh

[jms]

#this seems to work
DONOT=0
# But if we set DONOT to1 the material is correctely addde but
# the mesh is  not display whe, we try to render the picture.

import Blender
from Blender import *

me=NMesh.GetRaw()
v=NMesh.Vert(1.0,0.0,0.0)
me.verts.append(v)
v=NMesh.Vert(1.0,1.0,0.0)
me.verts.append(v)
v=NMesh.Vert(0.0,1.0,0.0)
me.verts.append(v)
v=NMesh.Vert(0.0,0.0,0.0)
me.verts.append(v)

f=NMesh.Face()
f.v.append(me.verts[0])
f.v.append(me.verts[1])
f.v.append(me.verts[2])
f.v.append(me.verts[3])

uv=[]

uv.append( (0.0,0.0))
uv.append( (1.0,0.0))
uv.append( (1.0,1.0))
uv.append( (0.0,1.0))

f.uv=uv

im=Image.Load('f:/maincrystalpalace3.jpg')
f.image = im

if Blender.Get('version')>=228:
     C = NMesh.FaceModes
else:
     C = NMesh.Const

f.mode=C['LIGHT']+C['TEX']+C['TWOSIDE']

me.faces.append(f)


if DONOT:
   newmat = Material.New('newmat')
   newmat.mode = newmat.mode  | 2048
   #me.materials.append(newmat)    
   me.setMaterials([newmat])
   f.materials=1
   tex = Texture.New()     
   tex.setType('Image')               
   tex.image = im               
   newmat.setTexture(0, tex)                                        
   mtex = newmat.getTextures()
   mtex[0].texco=Texture.TexCo.UV


NMesh.PutRaw(me,"Plane.002")
Blender.Redraw()