1394A external device can't be recognized

techo

hi All,

is there any one had experienced 1394A external device can't be recognized under OS?

  C4 U( d# L- z, L2 M- M0 WI encounter this kind of issue recently.
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  U# Z  b3 I* o% e) T2 L0 d$ r* _OS is Vista & XP.
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" E7 ?: _) N; M6 `5 F& O. l' d1394A controller is Ricoh.

1 Y! x3 o3 A8 ]+ fthe situation is I could see the removable icon shown on the system tray but there is no device in OS device manager.
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indeed there are some differents but I don't know why.
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1 M5 [' z* @- l/ o6 yI 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?
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( c  h  |! q% T/ jThanks anyway!