[oopic] A2D Troubles

I'm relatively green with the OOPic and I'm trying my first A2D
connection. I have the OOPic connected to an LCD that I've tested
throughly that displays the values of the A2D. My problem is that it
gives a nominal value for the voltage that fluctuates around 512. It
does give meaningful values from 2.5v to 5v but nothing below that.
Does anyone know what I'm doing wrong? Thanks.

Here is my code snippet. I've left out the LCD stuff for brevity.

Dim volt As New oA2D10

Sub main()

volt.IOLine = 1
volt.Operate = 1

do
LCD.String = STR$(volt.Value) 'Outputs data to display on LCD
OOPic.delay = 10
Loop

End Sub

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