I am running into the same problem. I am using a single USB-6009 card recording 2 channels of voltage. I had installed the 7.5 version of the driver and tried to use VI Logger (2.0.1) to display my voltages then save, however the task will not let me save. So i tried to upgrade the USB-6009 driver to 8.0 to no avail.
I had been using NI Data Logger last summer on a different machine, but this time when i installed the board it will not display under the NI DAQmx Base list of devices, I do not understand why, but decided that it was better to forget about this and move on to the newer technology, unfortunately with neither working I am at a bit of a lose.
I do not know it it matters but computer also has version 7.1 of Labview. I would really like to get this thing going so if anyone knows how to remove this "Database does not exist upon specified path" it would be much appreciated.