I have checked your post plenty of times, since I used to have the same problems as you, and was waiting for someone to give you an answer, but I have recently worked out myself how to connect my Arturia SparkLE controller to my computer and use it to control SPARK as a VST inside a track in REAPER. (Maybe you have already found a solution for this problem). I hope you still follow this thread after all this time. I can also speak Spanish, just in case it is your native language.
NOTE: I read in your previous message you have problems with your English.
