No module named cython_nms

[summerrr]

user10@Gpu1:~/notebook/TensorFlow-R-FCN-for-primary-students$ sh run
Traceback (most recent call last):
File "./tools/demo2.py", line 12, in
from model.test import im_detect
File "/home/user10/notebook/TensorFlow-R-FCN-for-primary-students/tools/../lib/model/test.py", line 20, in
from utils.cython_nms import nms, nms_new
ImportError: No module named cython_nms
do you know why？I make and have these files in lib/utils ,whether I lack something?
bbox.c cython_bbox.cpython-35m-x86_64-linux-gnu.so nms.pyc
bbox.pyx cython_nms.cpython-35m-x86_64-linux-gnu.so nms.pyx
blob.py init.py pycache
blob.pyc init.pyc timer.py
boxes_grid.py nms.c timer.pyc
boxes_grid.pyc nms.py

[engineer1109]

Under ./lib
make

[noopur2805]

How did you solve this error?