Missing module

[xiaoyonf]

Hi, I ran the command as:
python2.7 HiCPlotter.py -f /Users/xiaoyongfu/Documents/bioinformatics/HiC_data/Jin_TCC_MCF7/SRR6493702/raw/500000/SRR6493702_500000.matrix -chr chr14 -o Jin_P_TamR -r 500000 -tri 1 -bed /Users/xiaoyongfu/Documents/bioinformatics/HiC_data/Jin_TCC_MCF7/SRR6493702/raw/500000/SRR6493702_500000_abs.bed -n MCF7 -s 650 -e 700
I got the following error:
Traceback (most recent call last):
File "HiCPlotter.py", line 14, in
from mpl_toolkits.axes_grid1 import make_axes_locatable
ImportError: No module named mpl_toolkits.axes_grid1
I have numpy, scipy, and matplotlib installed under python2.7. Am I missing anything?
Thanks for help!
Xiaoyong