question about giving movement to non moving units...

[numskully]

the Thing from Beyond is recruited through the Void on Ryleh (number 750)

i use this command in a mod file im making, everything else works fine but i cant give a Thing from Beyond map movement. how do i do this?

(below is text im trying to use)
#selectmonster 750
#mapmove 1
#end

thanks!