Unfortunately what you are wanting to do is simply not possible.
This particular model does not have a built in duplexer unit, so it is not capable of printing double sided automatically.
On this model it s only available as a manual process, so you'd have to print one side, flip the paper, then print the other.
Since this is a new printer, if that is a feature you need, you'd be better off returning it and buying a different model.
The next model up does support duplexing, which is the 9330: http://amzn.to/2dxLOv3 and is only about $50 more, which is a worthwhile investment if you need to duplex frequently.
My apologies for the news, this is simply a limitation of the 9130 model.
If you have any other questions, just let me know. Otherwise, please take a moment to rate my service as this is the only way I am credited for my time. Hopefully I have earned 5 Stars but if not please let me know what I can do to ensure you are satisfied. I also invite you to contact me directly with any future support needs at http://bit.ly/1QwLxGh and ask for Nathan.
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