Hi guys, i justy bought an aerobird Swift, i went to a nice place to fly it, everything was well done ( i tought it was :P) trims at center, battery full charged, nice motor sound, etc. When i tryed to put it in the sky my plane just went to the floor as many times as i tryed to put it in the air, my manual talks about some screws for get a good clim rate but information its so short, it talks about 2 screws, im not sure if those are the 2 yellow screws on tail, i see under the tail some planes use a ruberband i dont know if my plance must to use one too, manual dosent talk about, and i see a little black plastic piece with a ruberband on it wich i cant figurate where i must to place it manual dosent talk about that piece too, plese guys any help, any advise in advance is very helpfull, ill put some pictures about Tail to make it more easy, THX!!!!!

Sorry about my english =)