moveInDriver not triggering Options

[crockid5]

If I do

CODE

player moveInDriver _vehicle;

Then the player will move into the driver seat of "_vehicle".

However, if I do

CODE

_guy = "TK_INS_Soldier_2_EP1" createUnit [getPos _vehicle, _group];
_guy moveInDriver _vehicle;

Then nothing happens, the guy doesn't move into the front seat of the vehicle, he just spawns next to it. Does anyone know why?