The biggest issue I have with my 14 yo aspie son is his complete disregard for anything I try to tell him,, regardless of what it is. When I start speaking, he repeatedly says yeah yeah yeah.. I'm at my wits end.
I have found with both of my kids that they both would listen to others than myself. I don't know if this is the case w/ you but you can try having someone your son likes whether a relative,teacher or close friend speak to him and see what happens