Hello,
What might be happening is that your device is writing out to both of the expected digital lines, but not simultaneously as you are hoping. Instead, one line is being written to, and then the next line gets configured, and by doing so, reconfigures the other line as well and resets its state. You may want to check to see if something like this could be possible accoridng to your LabVIEW coding.
Some troubleshooting steps that you could take to make sure things do work correctly are to see if you can send the signal on any individual line. So if you have no problem writing to pin 45 by itself, then the problem is somehow related to writing to both pins. Try this combination with different pins. See if you get the same behavior. Also, remember that PC-DIO
-24 has 24 lines of static DIO lines. You are not receiving any hardware timing in outputting your signals. When the signals actually get generated is software dependent.
I'm not sure if you are using code that you generated yourself, but you may want to consider looking through some of the Digital I/O examples that get shipped with LabVIEW. Those examples have been tested and known to work, that would help in troubleshooting this occassion.
Feel free to post back to this discussion if you have further questions on this issue.
Jared A
