Guiobjectview mount

Hi, I am trying to mount, but no matter where I set the mount point, the weapon always get mounted between my character's feet, any idea?
I used PlayerView.mountObject("weapon","weapon.dts","","player.dts","Bip01",0);
maybe someone can explain in depth the arguments mountObject is taking.
here's the source where guiobjectview is taken from: http://www.garagegames.com/index.php?sec=mg&mod=resource&page=view&qid=9617

thanks