ImportError: No module named backend_tkagg

[Sarawut]

I use GUI2Exe to compile my python code but I found the error as
following. Anyone can give me a suggestion, how to solve this error.
Thanks,
Sarawut

Traceback (most recent call last):
File "main.py", line 5, in <module>
File "ui\MainWindow.pyc", line 12, in <module>
File "pylab.pyc", line 1, in <module>
File "matplotlib\pylab.pyc", line 247, in <module>
File "matplotlib\pyplot.pyc", line 78, in <module>
File "matplotlib\backends\__init__.pyc", line 25, in pylab_setup
ImportError: No module named backend_tkagg