I suggest you search the Web with "HS488 LabVIEW" and take a look at the "hits" you get. You could also open MAX, expand "Devices and Interfaces" and "Software" and attach a screen shot so we can "see what you have". What version (year and 32/64 bittedness) of LabVIEW are you running? Have you tried running a Test Panel on the HS488 device and seeing whether you can get a response from the device?
Do you have a manual for the device you are trying to see? Can you attach a copy for us to see?
I am trying to use TNT4882-BQ chip to enable an HS488 communication between the host PC and my lab facility. Thus, I have no manual for the instrument now, and I am drafting it. 🙂
But the NI MAX was very helpful and I have figured out how to set the HS488 in LabVIEW. Just in case someone else wants to try, I attached my setting for the test. The handshake captured by a logic analyzer is also attached.