Spectrum analyser for USB raw

Hi,
I am new to Labview. I have a 3rd party RFID device which i intend to acquire the frequency waveform from the device through using Labview. Since as a beginner, i use the spectrum analyser in the "example" section to start off with and now has error in getting the correct Visa USB raw to connect my device. The program intiallly used Visa instrument as the visa resource name but when i changed the input to the USB raw input there is a class conflict error that says "You have connected a refnum of one type to a refnum of another type and both types are members of some class hierarchy, but there is neither a simple up cast nor type cast between the two classes." 
For the USB raw setting, i have already configured the device using the NI-driver wizard to install the USB raw and tested it through the MAX. So now i believe the problem should be wiring of USB raw to the entire spectrum analyser example. Attached is the spectrum analyzer example. Really hope to get help on this matter. Thank you. 
Attachments:
Template - Spectrum Analyzer Acquire Trace.vi ‏25 KB

duplicate post: http://forums.ni.com/ni/board/message?board.id=170&message.id=489189

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