I am sorry to hear that you are still experiencing problems, unfortunately I do not know what you mean by labview assess routines work. Please could you explain stating the functions being used and what it does.
Have you tested the ADC-11 with Picoscope does it work in this application. If not check the following:
Parallel port mode settings through the BIOS: Normal, Unidirectional, Output Only, SPP.
Not: ECP, EPP, or Bidirectional.
Check the IO is 0378 - 037F, this is the recommended IO address.
Make sure no other program is trying to control the parallel port.
The other routines listed are for internal use and not defined for customer use.