G'day folks,

I have been working on a couple of default MOH models for days and have gone through the LR3D tutorials, downloaded the help CHM and even performed Google & YouTube searches but can't find how to do the most basic task of moving selected vertices.
I select the vertices that I wish to move then select the "Move" tool from the menu and proceed to drag the x,y,z icon thingy but it moves the entire model part (all vertices).
I've also tried dragging the selected verts.
This messes the entire model and it's so frustrating having to reload / import the model over and over.
I have also tried many commonly used directional keys (wasd, directional arrows, keypad 2 4 6 8, page Up, Page Down, etc).
It seems nothing works. Pressing the rest of the keys individually only confirmed it.

How do you move a single vertex or a selected group of vertices without moving the entire part?

Thank you.