That is really strange. I have no idea why it isn’t working for you. If I were in your position, I’d go over the FB dev portal in detail and make sure all is correctly set up (I’d also reference this guide to make sure I’m not missing anything – http://docs.coronalabs.com/daily/guide/social/setupFacebook/index.html) When I’m 100% sure all is properly in place (and if it’s still not working), I’d uninstall the app, generate a new APK, reinstall, and see if it works. If not, I’d try another android device just in case…
Good luck.
Naomi