I tried one last thing too.  So the combined .dem is made from 4 separate dem files and stiched together in 3dem.  I tried loading each individual dem into vue and it worked, however, then I am left with 4 separate terrains to edit when I need to edit it as one.  Anyway to combine them to make it one, almost like a "join command.?"  If this doesn't work I am tempeted to send you the terrain I need, this was the test terrain so to speak to try this method out.  The terrain I am in need of is a different part.