Mtl Tf extraction

Output:
leftSphere: 0 0 0
rightSphere: 0 0 0 	<-- Error
floor: 0 0 0
ceiling: 0 0 0
backWall: 0 0 0
rightWall: 0 0 0
leftWall: 0 0 0
light: 0 0 0		<-- Error?

Code:
		aiString name;
		mat->Get(AI_MATKEY_NAME, name);
		aiColor3D transparent;
		mat->Get(AI_MATKEY_COLOR_TRANSPARENT, transparent);
		cout << name.C_Str() << ": " << transparent.r << " " << transparent.g << " " << transparent.b << endl;

Source .mtl:
		# The sphere Cornell Box as seen in Henrik Jensen's
# "Realistic Image Synthesis Using Photon Mapping" (Page 107 Fig. 9.10) in OBJ format.
# Note that the real box is not a perfect cube, so
# the faces are imperfect in this data set.
#
# Created by Guedis Cardenas and Morgan McGuire at Williams College, 2011
# Released into the Public Domain.
#
# http://graphics.cs.williams.edu/data
# http://www.graphics.cornell.edu/online/box/data.html
# http://www.cs.cmu.edu/~djames/15-864/pics/cornellBox.jpg
#


newmtl leftSphere
    Ka 0.01 0.01 0.01
    Kd 0.01 0.01 0.01
    Ks 0.95 0.95 0.95
    Ns 1000
    illum 5

newmtl rightSphere
    Ka 0.01 0.01 0.01
    Kd 0.01 0.01 0.01
    Ks 0.30 0.30 0.30
    Tf 0.10 0.10 0.10
    Ns 200
    Ni 2.5
    illum 7

newmtl floor
    Ns 10.0000
    Ni 1.5000
    illum 2
    Ka 0.7250 0.7100 0.6800
    Kd 0.7250 0.7100 0.6800
	Ks 0 0 0

newmtl ceiling
    Ns 10.0000
    Ni 1.5000
    illum 2
    Ka 0.7250 0.7100 0.6800
    Kd 0.7250 0.7100 0.6800
    Ks 0.0000 0.0000 0.0000

newmtl backWall
	Ns 10.0000
	Ni 1.5000
	illum 2
	Ka 0.7250 0.7100 0.6800
	Kd 0.7250 0.7100 0.6800
	Ks 0.0000 0.0000 0.0000
	Ke 0.0000 0.0000 0.0000

newmtl rightWall
    Ns 10.0000
    illum 2
    Ka 0.161 0.133 0.427 # Blue
    Kd 0.161 0.133 0.427
	Ks 0 0 0

newmtl leftWall
	Ns 10.0000
	illum 2
	Ka 0.6300 0.0650 0.0500
	Kd 0.6300 0.0650 0.0500
	Ks 0 0 0

newmtl light
	Ns 10.0000
	Ni 1.5000
	d 1.0000
	Tr 0.0000
	Tf 1.0000 1.0000 1.0000
	illum 2
	Ka 0.7800 0.7800 0.7800
	Kd 0.7800 0.7800 0.7800
    Ke 10 10 10
	Ks 0 0 0