I would hazard a guess that you are trying to use the Labview vi's with this MCC board. That can't be done. They supply a CD called "universal Library for Labview", that has their vi's on it. You MUST use their vi's! If you did not receive this with your board, it can be purchased from Measurement Computing. I know you can download their CD called "universal Library", but this is not the same as the "Universal Library for Labview". You might want to have a look on their FTP site, though, as I have not been there lately. I believe it is
ftp://www.measurementcomputing.com. Try this, and let us know how you make out. If you are still having difficulty with their Labview library, come back and we will try to guide you through it.
In their newewst version, they have some "bridge vi's" that are SUPPOSED to let you use your original Labview vi's with their boards, but I would strongly advise against using them. I have had nothing but grief attempting this. They appear to work at first, but go buggy with time!
Have fun
Dave