can't flash kernel with odin

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http://forum.xda-developers.com – hi, i've got CyanogenMod 7.2 (Alpha9) on my galaxy 3, i initially used odin, then found i had the 0kb free space issue, but then used CWM to flash from a zip file and it's now working fine. i'd like to put the MTD version on it, and i'm trying to follow the instructions here http://forum.xda-developers.com/show....php?t=2309390, but i can't get odin to flash the 1Ghz overclock mtd kernel. the version of odin that i initially flashed the rom with has no problem establishing a connection with my phone, but says the .tar file is an invalid image when i try to load it in the PDA section. i've t (HowTos)