If you want 64 bit drivers for your 2300W, go here and report the file as missing. If we get enough requests, we can get KM to make a driver.
http://onyxftp.mykonicaminolta.com/download/MissingFile.aspx?productid=992
http://onyxftp.mykonicaminolta.com/download/MissingFile.aspx?productid=992