Please check that if you have added some filters in NPrinting and that filter may trimmed off the data in table.
The second thing is if you update any object in the QVW file, please refresh the meta data in connection streams. After refreshing it, please right click on the table object in NPrinting and update the object. After that you view your data.
Please do the above work, and if it does not work for you, please let me know.