Android tablet not recognizing external keyboard?
Yes, I had the same issue, it never worked for any PC USB Keyboards, except the one which we bought from DOMO, that nCase K6. That K6 worked perfectly (even to my PC). But a PC USB mouse worked on my DOMO Slate X3G. Buy a nCase K6 or, preferably you could install USB Host Controller from Play Store, as said by the first answer.. That should fix your issues.