I am currently attempting to use DirectRT to present video stimuli while collecting gaze data with eye-tracking software (ASL 6000, Eyenal). In order to analyze the data, I need to send event markers from DirectRT, through the parallel port, to Eyenal. However, I cannot access the parallel port through DirectRT on my stimulus computer. My input file is functioning as needed, as I have run it from another computer with DirectRT and was able to send ttl signals to EEG equipment.

I am using the stimulus computer as a Power User and I have full rights to the DirectRT folder on the C drive. When I attempt to run the TTL I/O test, I continue to get "LPT1:Error" (for LPT1, 2, and 3). When logged into the computer as an Administrator, instead of the Error message I get "888 (LPT1:378H)".

Can anyone advise me as to how I get the appropriate rights/change the rights settings in order to write to the parallel port?

Susan