Q. Why the PIO-PISO.exe identifies the cards, but other programs failed and show the error message "Card initialize error" or "No PIO/PISO card in this system". A. The PIO_PISO.EXE directly access the PCI Controller to get the device's information, but it doesn't enough to supports the full features (For example: ISR"Interrupt Service Routine"..) of every devices. Thus, we have to provide drivers to support devices, and users have to install these drivers correctly to make sure devices can works with full features. As you can see that they works totally differently. Under Windows 9X/2000, users have to finish the Plug&Play settings. Please refer to "Inf\PnPInstall.pdf" to finish it. Please also refer to "Manual\ResCheck.pdf" to check your system resource. If you still got the problems, please try ... 1. Plug the card into another slot. 2. Check and adjust the BIOS setting. 3. Disable the "OS PNP" feature of BIOS. 4. Un-plug other devices. 5. Contact us. While the card can't be found in the system, the different drivers of OS will have the different behaves. A. Windows 9X/ME 1. Loading driver OK 2. Failed while search card or the TotalBoards parameter returns 0. B. Windows NT 1. Failed while loading drivers. (Driver Initialize Error!!) C. Windows 2000 1. Failed while loading drivers. (Driver Initialize Error!!) Note: Most of the NT drivers doesn't works under Windows 2000. Please uses the correct toolkit (contains drivers). =================================================== Q. Can I use relay-output to control a D/I for interrupt-source? A. No, it is not recommended since the relay-output has coupling (like the bouncing) behave. This causes the interrupt be triggerred more times you want, and some too fast triggers (bouncings) will be lost. When using multiple relays to control multiple interrupt sources, the relays may not stable at the same time. (For example, outputs 0xAA to relays but gets 0x0A status from interrupt source.) You will get wrong information since the interrupt sources does not stable. It is recommended to uses other stable external signals to be the trigger source.