Ok GOT IT, apparently you cannot move a respawn marker such as respawn_west through a client

This just means you can't move the base respawn marker but I believe it should work fine for the insertion marker.. Here is the new script

_caller = _this select 1;
openMap true;
onMapSingleClick "'marker1' setMarkerPos _pos; clicked = 1; openmap false;onMapSingleClick ''; true;";

Add this code to a notepad file and save it in your mission folder and name it moveMarker.sqf
To make this code work for you, simply change "marker1" to the to the name of your insertion marker that you want to move

Add this code to a notepad file and save it in your mission folder and name it moveMarker.sqf

Then to add the action to a player put this in there initialization box: this addAction ["Move insertion points","moveMarker"];

.. If you have the debug menu active for your mission you can just put this code in there and then change "this" to the name of the unit you want to add it to and hit "Local Exec"

Here is a demo mission: http://www.mediafire.com/download/thdz182v15dc57m/MarkerMovement.VR.pbo
non-pbo'ed version: http://www.mediafire.com/download/iaj2umqzua9iwy4/MarkerMovement.VR.rar