whether the CWDIO control can be used for USB-6525(Windows 7)

Hi Everybody,

My problem is using the CWDIO components to control NI USB-6525.

Information:

OS: Windows 7

Programming Language: C# & VB

Question:

I add the components CWDIO, but it always throw out "run time error 68: Invaild device" when I execute this "CWDIO1.SignalWrite 0"

But if I use the NI PCI-6503 with same command , it works properly well.

1. Is this components able to control the the USB-6525?

2. Why there is no error message throw out when there is no DIO card connected using this component?