Run Error

[kazunaritakeichi]

When I ran train, I got the message below.
How can I fix it?

Using Theano backend.
WARNING (theano.sandbox.cuda): The cuda backend is deprecated and will be removed in the next release (v0.10). Please switch to the gpuarray backend. You can get more information about how to switch at this URL:
https://github.com/Theano/Theano/wiki/Converting-to-the-new-gpu-back-end%28gpuarray%29

Using gpu device 0: GeForce GTX 1080 Ti (CNMeM is disabled, cuDNN 5110)
Traceback (most recent call last):
File "train.py", line 39, in
FCN = FullyConvolutionalNetwork(img_height=img_size, img_width=img_size, FCN_CLASSES=nb_class)
File "/home/takeichi/Deeplearning/FCN_via_keras/model.py", line 38, in init
input_shape=(3, self.img_height, self.img_width))
File "/usr/local/lib/python2.7/dist-packages/keras/applications/vgg16.py", line 79, in VGG16
include_top=include_top)
File "/usr/local/lib/python2.7/dist-packages/keras/applications/imagenet_utils.py", line 131, in _obtain_input_shape
'input_shape=' + str(input_shape) + '')
ValueError: The input must have 3 channels; got input_shape=(3, 224, 224)

.keras/keras.json is below.
{
"epsilon": 1e-07,
"floatx": "float32",
"image_data_format": "th",
"backend": "theano"
}

Thank you.