What is niorbmap? Shows as rootkit

Hi

Sorry Im not sure where to post this as Im not sure what it relates to.

I have drivers (+whatever else was bundled with them) installed for the NI USB-RS232 cable.

Since hten I have done a quick rootkit scan using Spybot S&D which has notified me that the file C:\Windows\System32\niorbmap may be a possible rootkit infection. When I browse to the location the file is not visible - not a good sign.

I assumed from the name and one mention-in-passing here on the forums that it is an NI related file.

Could someone confirm this and if so explain why it may be detected as a rootkit?

Thanks