uploading problem

Hi'

I'm using DEeEle DEeduino Uno. Can't upload my program. Please help.

Arduino: 1.6.12 (Windows 7), Board: "Arduino/Genuino Uno"

Sketch uses 928 bytes (2%) of program storage space. Maximum is 32,256 bytes.
Global variables use 9 bytes (0%) of dynamic memory, leaving 2,039 bytes for local variables. Maximum is 2,048 bytes.

avrdude: ser_open(): can't set com-state for "\.\COM3"
An error occurred while uploading the sketch

This report would have more information with
"Show verbose output during compilation"
option enabled in File -> Preferences.

Some troubleshooting information: Guide Troubleshooting upload