This question is rather old, but I just now bumped into the same issue, solved it and could not find a solution.
The issue is that this keyboard, by default, is set for as a small keyboard with a low density. Review this reference for more information:
http://developer.android.com/guide/topics/manifest/supports-screens-element.html
Here are my settings that solved the issue located in the AndroidManifest.xml
file:
<supports-screens android:resizeable="false"
android:smallScreens="false"
android:normalScreens="false"
android:largeScreens="true"
android:xlargeScreens="true"
android:anyDensity="true"
android:requiresSmallestWidthDp="600"
android:compatibleWidthLimitDp="600"
android:largestWidthLimitDp="600"/>