Reading from Parallel port error

[StevenInToronto]

I want to read a 8-bit data from parallel port. I download the sample code, and it shows error -1073807339. I tried to use Port in and port out function, it shows error too. I check the device manager from windows, it shows LPT1 is working properly.

Please help me.

Labview 2011. windows 7.

[smercurio_fc]

You should read this: http://digital.ni.com/public.nsf/allkb/B937AC4D8664E37886257206000551CB

[StevenInToronto]

I read the file already. I connected pin11 pin12 to ground, and downloaded the sample code, but it still doesn't work, same error comes out.