Newbie Question, I'm Sure, Re/ p...() Commands

I am hoping that this is just a newbie question.  I just installed Plua 2.0 onto my Palm T3 running OS 5.2.1.  I see references to the use of such commands as pclear() and pevent() in various tutorials and examples, but Plua 2.0 does not seem like them.  I receive error messages to the effect of "attempt to call global 'pevent' (a nil value)"; same for pclear.

The following is the example code taken straight from the "First App in 10 Minutes: A Plua Tutorial":

-- FirstApp.lua
pmoveto(70,70)
plabel("My First App works!")
pevent()

Seems pretty simple and straight forward.  Is there some additional Plua component that I may be missing?  When I reference the built in Plua Help system there is no mention of these p... commands within the Index.  I am assuming that these are implemented in version 2.0 due to the usage of such in the various examples I have looked at.  Any suggestions?

Thanks.