That quote you found is just an explanation why neither ASIO4All nor KoordASIO are "true" ASIO drivers, but the real explanation for your issue is listed right in the KoordASIO system requirements: It is a pure 64-bit driver and requires a 64-bit host. XMPlay is a 32-bit host, so it is not suported by KoordASIO. As XMPlay support WASAPI, you are best off just using its built-in WASAPI exclusive support, no need to install a driver like KoordASIO.