The version you have already on your site is just totally wrong. 
Also this version is in original key.

Voice of a Child
by Michael Card
Copyright 1991, Sparrow records

D C 
D C
D C (C G/B C G/B)
Am C/G F
Am C/G F
Am A/C# D

chorus:
D G Em E/G# A F#/A#
Bm D/A G D/F# Em A D