I'm controlling GPCTR0 on a PCI-6035E card with software (Labwindows) that has it send out a single logic pulse. In the past month, the counter has gone from working fine, to outputting pulses of about .1V, to not pulsing at all. I've tried switching to counter 1, to no avail. I've also run the online diagnostic on the PCI card, and it passes alll of the tests. What's going on?