1394A external device can't be recognized

techo

hi All,

, S8 h) T6 e6 T1 _* Y$ y+ \! P' r7 Ais there any one had experienced 1394A external device can't be recognized under OS?

, N3 I  X  }- f( }I encounter this kind of issue recently.

+ L/ o2 H/ Y% a0 G! LOS is Vista & XP.

: Q! L  e) _/ o: P- q. p1394A controller is Ricoh.

the situation is I could see the removable icon shown on the system tray but there is no device in OS device manager.
" S! p. Y2 }; g7 V3 Z5 U  a2 v
indeed there are some differents but I don't know why.
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I wonder it's caused by BIOS but how to prove it?
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is there any spec or document could let me refer to?

Thanks anyway!