Can not start training , no images found

i put my images to /opt/DCGAN-tensorflow-master/data/newdir
and images size is 96*96 jpg file.
commond is
```
python main.py --image_size 96 --output_size 64 --dataset /opt/DCGAN-tensorflow-master/data/newdir --crop True --train True --epoch 100
```
but when i start it , no error messages, just
```
[*] Reading checkpoints...
[*] Failed to find a checkpoint
[!] Load failed...
Epoch: [ 0] [ 0/ 1] time: 15.5218, d_loss: 9.14778900, g_loss: 0.00019971
Epoch: [ 1] [ 0/ 1] time: 30.9486, d_loss: 6.79908276, g_loss: 0.00135914
```
i put over 100 images named xxx-xx.jpg , but it could't be found