See the FAQ, question U09.
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Thank you. Unfortunately, that method is not stable. Not working for all the posts.
I have tried this step and it did not work. I an new to using this feature. The fist post went to Facebook so I was really excited, but my second post did not and I cannot figure out why. I followed all the same steps. Then came here to see what to do and found this suggestion. Tried it and still not post. Please advice.
authormingle, I ended up switching to SNAP. way better than this plugin.
give it a try.
http://wordpress.org/plugins/social-networks-auto-poster-facebook-twitter-g/