The most common causes of this issue are:
If you need DirectInput support for your DualShock controllers while using the SCP driver, you can try this wrapper.Your IP address has been temporarily blocked due to a large number of HTTP requests.The only way to fully disconnect it is to restart the SCP service, done either by manually restarting it or by restarting your computer. This is especially a pain when changing between different controller types (from a DS3 to a 360 pad, for example). Its controller (player) number will remain locked at what it was, and any other controllers added to the setup will need to work around it. Putting a controller to sleep will not actually fully turn it off. To put a DS3/DS4 to sleep, hold L1 + R1 + Home.You will not be able to use other Bluetooth devices with it until you uninstall the Bluetooth SCP driver from the adapter. Installing the Bluetooth SCP driver, which lets you connect your DS3/DS4 devices to your computer wirelessly via a Bluetooth adapter, requires the adapter to be solely dedicated to the SCP service.If done properly this will also enable you to use pressure sensitive buttons without any further configuration.You'll still need to bind the controls.For PCSX-R's hotkeys, since Windows messaging input kills them. Set keyboard input to raw while you're at it.Now disable all other Game Device APIs other than native if you haven't already.Then copy over XInput1_3.dll from /bin/Win32/ to PCSX2 or PCSX-Reloaded's directory.To prevent crashing, which seems to vary from system to system. You may also need to disable DirectInput and XInput before the next step.Change the pad plugin in PCSX2 or PCSX-Reloaded from the default LilyPad to the LilyPad-SCP version.