why hotplug cannot support D-link DBT-120 driver problem?

Hi every guy,
My linux operation system is Mandrake9.1, the kernel version is 2.4.21-0.13mdk. I install bluez-bluefw-1.0. The system can detect 3COM 3RCEB96 bluetooth usb adapter, but cannot detect D-link DBT-120.

I check the log and cat /proc/bus/usb/devices;
They report:

hub.c: new USB device 00:07.2-2, assigned address 4
usb.c: USB device 4 (vend/prod 0xa5c/0x2033) is not claimed by any active driver.

[root@mandrake1 usb]# cat /proc/bus/usb/devices

T:  Bus
 Lev Prnt Port Cnt Dev#=  1 Spd  MxCh= 2
B:  Alloc=  0/900 us ( 0%), #Int=  0, #Iso=  0
D:  Ver= 1.00 Cls	(hub  ) Sub Prot MxPS= 8 #Cfgs=  1
P:  Vendor00 ProdID00 Rev= 0.00
S:  Product=USB UHCI Root Hub
S:  SerialNumber�00
C:* #Ifs= 1 Cfg#= 1 Atr@ MxPwr=  0mA
I:  If#= 0 Alt= 0 #EPs= 1 Cls	(hub  ) Sub Prot Driver=hub
E:  Ad�(I) Atr(Int.) MxPS=   8 Ivl%5ms
T:  Bus
 Lev
 Prnt
 Port
 Cnt
 Dev#=  7 Spd  MxCh= 0
D:  Ver= 1.01 Cls�(unk. ) Sub
 Prot
 MxPSd #Cfgs=  1
P:  Vendor
5c ProdID 33 Rev= 0.a0
C:* #Ifs= 3 Cfg#= 1 Atr� MxPwr0mA
I:  If#= 0 Alt= 0 #EPs= 3 Cls�(unk. ) Sub
 Prot
 Driver=(none)
E:  Ad�(I) Atr(Int.) MxPS=  16 Ivl=1ms
E:  Ad�(I) Atr(Bulk) MxPS=  64 Ivl=0ms
E:  Ad(O) Atr(Bulk) MxPS=  64 Ivl=0ms
I:  If#= 1 Alt= 0 #EPs= 2 Cls�(unk. ) Sub
 Prot
 Driver=(none)
E:  Ad�(I) Atr
(Isoc) MxPS=   0 Ivl=1ms
E:  Ad(O) Atr
(Isoc) MxPS=   0 Ivl=1ms
I:  If#= 1 Alt= 1 #EPs= 2 Cls�(unk. ) Sub
 Prot
 Driver=(none)
E:  Ad�(I) Atr
(Isoc) MxPS=  16 Ivl=1ms
E:  Ad(O) Atr
(Isoc) MxPS=  16 Ivl=1ms
I:  If#= 1 Alt= 2 #EPs= 2 Cls�(unk. ) Sub
 Prot
 Driver=(none)
E:  Ad�(I) Atr
(Isoc) MxPS=  32 Ivl=1ms
E:  Ad(O) Atr
(Isoc) MxPS=  32 Ivl=1ms
I:  If#= 1 Alt= 3 #EPs= 2 Cls�(unk. ) Sub
 Prot
 Driver=(none)
E:  Ad�(I) Atr
(Isoc) MxPS=  32 Ivl=1ms
E:  Ad(O) Atr
(Isoc) MxPS=  32 Ivl=1ms
I:  If#= 1 Alt= 4 #EPs= 2 Cls�(unk. ) Sub
 Prot
 Driver=(none)
E:  Ad�(I) Atr
(Isoc) MxPS=  64 Ivl=1ms
E:  Ad(O) Atr
(Isoc) MxPS=  64 Ivl=1ms

if I use
bluefw usb 001/004,
every thing is ok.

I read the document about hotplug, but I still have no idea what I can do.

If anyone can give me some advice, I will be grateful.

Thank you very much

Jian Yang

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