NDIS IntermediateDriver: Cannot bind to underlying miniport Adapter.

Hello all!

This is my first NDIS Driver.
My IM Driver startup successfully,anything needed in DriverEntry is
done .Then my ProtocolPnPEvent Handler got NetEvent NetEventReconfigure with
NULL ProtocolBindingContext, I do call ReEnumerateBindings.After that,my
ProtocolPnPEvent Handler got NetEvent NetEventBindsCompletes two times. But
NDIS does not call to my ProtocolBindAdapterHandler.Why?

Can any one help me?
thanks all.