What CF card are you running? XP cannot use standby or hibernate on removable drives. If it's a SanDisk ExtremeI or UltraII you can use the fixed disk utility to set it to a fixed drive. If it's not one of those cards you can try to use the Hitachi Fixed Drive filter driver to "fool" XP into thinking the drive is fixed, but it probably still won't work. I tried using it on my ExtremeIII but standby and hibernate still wouldn't work.