ok these are the instructions on how to properly install the 64 bit version of the drivers for my dmx. PLEASE follow these instructions to the "T" no extra clicks no doing anything extra cause you thought it was the right way. Follow mine please.
Make sure you are using the latest build of my dmx. Software date should be march 9 2009. Also download the 64 bit drivers from our website found here: http://www.americandj.com/pdffiles/siudi_driver64.zip (That is a direct link to download the drivers) After you have downloaded the .Zip file of the drivers extract the folder in the .zip file to the desktop.
Now in some cases selecting these drivers in device manager should do you fine. BUT if that doesn't work we have another solution for you.
your first step will be too download a .zip file which chris has hosted for us. You can grab that file here: http://www.studio42.com/mydmx/myDMX64bit.zip
Now once you have that downloaded i want you to extract the contents of that .zip file to you desktop. once you have done that. Go to windows start menu> select computer> find you main harddrive in which my dmx is installed on ( usually C: Drive) and then in your C:drive loacate the my dmx folder and open it.
Now place the two files from the downloaded and extracted .zip file from chris's website and drag and drop them into the my dmx folder. when it asks you to overwrite select yes. if it asks you again select yes. After that you should be good to go. Close all your windows and you can delete the .zip files that were saved to your desktop once you confirmed my dmx is working on your 64 bit machine with the dongle attached and outputting DMX signal to your lights. hope this helps. Any questions let me know. If i need too i will record a screen video and put it up on you tube.