Genesect is an event Pokemon, that is yet to be released. In the future, there may be some Nintendo events which will let us obtain Genesect legitimately. As you say, you have Genesect, but since Genesect has not yet been released, I'm sure it's a hacked one, which is why you aren't getting the Drives you want from the professor in Black/White.Until the event, one can only hope for it's early arrival :(
-------------->I am still waiting for Nintendo to release me ! :(
Hope This Helps :)