Dynamic Load with Hardware?

AS title.
I try to load USB driver dynamically.
Get some wrong msgs.
Can I do it?
Reference by asm386\'s tutor.
thx

I modify BulkUSB sample.
When I use StartService to load driver,
the driver print \"exit BulkUsb_Unload\" and the return value=0.
Err Code:
1058 The service cannot be started, either because it is disabled or because it has no enabled devices associated with it.  ERROR_SERVICE_DISABLED
How to load it?
thx