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Forestry machines are I-sided, check which side you need here http://forestry.sengir.net/wiki.new/doku.php, I can't tell from the screenshot. Or edit the config file for forestry to make it they don't care about which side you use, or use a more intelligent piping system, Logistics into a chest then, EnderIO conduit it into the machine.
For instance if it's a carpenter.
Input:
Top/Bottom: Cartons and Crates (needs the recipe to be set beforehand!)
Sides: Crafting resources (needs the recipe to be set beforehand!
Does it work if you substitute the machine for a chest? If so then you probably need to either attach the pipe to another side of the machine or use the sneaky upgrades.