How do you use the piKey?

I don't know how to work it?
I downgraded from 3.71 M33-2 > 1.50 > 3.52 M33-4
And tried the piKey, and it doesn't work.
So I just downgraded back from 3.52 M33-4 > 1.50
And I am about to goto 3.40 OE-A
I hear the piKey works on it.

How do I turn the keyboard on?

~Sullivan~