moving creature!! please help!

i want to move my companion from one place to another when an area is loaded.
i used this script:

void main()
{
    object oDouglas = GetObjectByTag("party_douglas");
    douglasLoc Location(oArea, Vector(136.56,119.95,-0.124917), -36.4);
    SetLocation(oDouglas,douglasLoc);
    SetFollowerState(odouglas,FOLLOWER_STATE_AVAILABLE);
}


plus a GDA file making this script to run everytime the area is entered.
why it isn't working? a little help pleaseeeee
thanks and regards,