R u sure u r downloading kernels for sammy version ?
BTW ... i tried 4 kernels so far... speedmod (latest k3-12) rocks, very great kernel for me as an end user... siyah is great also but with less battery life (i applied dual boot and it worked great)
Sent from my GT-I9100 using XDA
So far I stay with Siyah as I have no other choice and if I get pissed off more I just try to reflash whole rom to get rid of it and come back to stock kernel. Maybe then I will be abale to flash other kernels.