I have the n2 with the r197 mod the last couple days every time my pick up sets for more then a couple hours w/ my navi disc in i get a messege saying insert the right disk i insert the navi disc back in says insert again i have to take the disk out and hit the reset button under the face to get it to work again so i took the disc out and let it set came back out w/ no disc in same messege??? any help would be great Thanks Joey