Unfortunately this did not work. I'm getting only around 575 k/h with each R9 290, and am still getting the "Share is above target" error on every share I mine. My cards are not overheating (stable at about 80 degrees each), and I have two PSU's powering them. Was getting 900 k/h on two of the cards and 870 on the other prior to switching to sgminer. From my understanding I should be getting like 8 m/h with each r9 290 on this coin, not 575 k/h. For the life of me I can't figure out what is going on. Is there something else in the SGminer setup I have to put in to make it so it knows it is scrypt? My understanding was that sgminer didn't need you to specify that it is a scrypt coin.
Try to delete your sgminer folder and download it again
http://www.sgminerwindows.com/and add the settings and this is a must "nfactor" : "6",