My custom enemy problem

I'm having trouble with my custom enemy "spinner", I can't figure out the problem so, could any of you try this wad and tell me what the problem is.
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http://dl.dropbox.com/u/75668365/spinner.wad

You only have 10 sprite frames, but tried to use a non-existent eleventh one. Remember, spritesubnumber counts up from zero, not one.

In the future, you should start by trying to figure out where in your SOC a problem occurs. While in this case the console just outright told you that you were using a sprite that didn't exist, if for some reason it hadn't, you could have deduced which state was the problem just by slowing them all down and seeing when the problem happens.

Thanks for the help I fixed it now