Millisecond Forums

HiI am attempting to get two copies of Inquisit talking to one another using TTL. Each copy is running on a Window 7 64bit Dell laptop, and the two are connected via a 25 pin parallel cable through Dell's legacy extender (my understanding is that it's essentially a port replicator). Within each computer, I appear to be able to access the parallel port using a separate piece of software that allows me to manually set various pins high/low, and I can verify that this is working using Inquisit's "receive" function in the port monitor - in other words, if I manually set pin 9 to "high" I am able to receive the code "128" in the Data Register (again, all within the same computer). However, I am unable to successfully send a TTL signal from one computer to the other using Inquisit's port monitor. Sending a code from one computer appears to have no effect on the other. Can anyone point me in the right direction? Are these port replicators incompatible with Inquisit? Is there any other solution for modern systems?