Please help me

Ive upgraded to XP 64 bit for my Racing machine...(need to for the supermodel emu).
Anyway, I can't for the life of me work out why I can't hide the desktop on start up.
I've shelled my front end (MaLa), and it boots into it fine.
But on start up I see a very quick "login" screen.....then the XP 64 bit desktop...then it loads MaLa. (also shows on shut down).
I've followed the instructions but I must be doing something wrong.....or does it not work for 64 bit??
See my attached screen shot
Thanks in advance