Yeah me too. Proving harder than I had hoped too. The .bin file that you'll find in the sgminer folder has the name of a kernel file at the begining of it. Mine always seems to pick ckolivas.cl. I had the scrypt130511.cl file in the kernel folder, but it doesn't pick it and if i delete the others it doesn't work and I can't make the kernal argument work either... so far.
What does you .BIN file start with, I wonder what kernel your actually using then?
sgminer has serveral kernel files but i don't know why it picks a particular kernel
Sorry I've been absent here for the last few days. Life always getting in the way! So I took a look in my sgminer folder, and the .BIN file that my miner created is: "scrypt130511Tahitiglg2tc8191w256l4.bin". So it looks like it's picking up the right kernel by itself. I'm not specifying anything for that in my arguments. Maybe you could try making a copy of your mining directory and delete all the .cl files in that one except scrypt130511.cl? Or have you found a workaround in the last few days?