welcome XXL and thanks for this post - just one question: has your XP64 machine more than 4 GB RAM?
i tried to install a phase24FW http://audiode.terratec.net/modules.php?op=modload&name=News&file=article&sid=5 and had no luck at all on an 8 GB XP64 machine (usually i'm not so untalented...) using driver version PHASE24FireWire_App_Drv_Vista_XP_2.41.40c.exe (firmware is also the latest version)
christian
edit: as mentioned above - the problem occures only in combination with firewire ... PCI-cards seem to be not affected
i tried to install a phase24FW http://audiode.terratec.net/modules.php?op=modload&name=News&file=article&sid=5 and had no luck at all on an 8 GB XP64 machine (usually i'm not so untalented...) using driver version PHASE24FireWire_App_Drv_Vista_XP_2.41.40c.exe (firmware is also the latest version)
christian
edit: as mentioned above - the problem occures only in combination with firewire ... PCI-cards seem to be not affected
and remember: only a CRAY can run an endless loop in just three seconds.