Won't work

[CedricMi]

Hey,
I'm trying to run the following with a Raspberry pi 2 model B:

pi@rbp2biancm1:~/Adafruit_Python_LED_Backpack/examples $ sudo python bicolor_matrix8x8_test.py

Traceback (most recent call last):
File "bicolor_matrix8x8_test.py", line 35, in
display.begin()
File "build/bdist.linux-armv7l/egg/Adafruit_LED_Backpack/HT16K33.py", line 53, in begin
File "build/bdist.linux-armv7l/egg/Adafruit_GPIO/I2C.py", line 127, in writeList
File "build/bdist.linux-armv7l/egg/Adafruit_PureIO/smbus.py", line 274, in write_i2c_block_data
IOError: [Errno 5] Input/output error

But there are no files nor subfolders in build/bdist.linux-armv7

Can you please fix this ?