Part Disappears from KSP After Adding Emissive Animation

[SiliconPyro]

I have a working part, an SRB. As soon as I add the animation for an emissive texture on the nozzle, KSP no longer loads the part. I go back to the VAB and get a message saying the craft can't be loaded because the part is no longer present (something like that) then I can't leave the VAB.

I'm using Unity 4.2.2 and an install of KSP that is dedicated to developing this SRB, no other mods.

Oh, and the emissive animation appears to work perfectly in Unity.

Here are a couple screen shots, in case they help.

[SiliconPyro]

Here's one of the nozzle glowing.

[SiliconPyro]

This might have something to do with it, but I'm not sure what it means.

[SiliconPyro]

Okay, I figured it out. I had the wrong version of Unity (don't use anything after 4.2.2) and I was using Part Tools 0.20. I fixed both problems and here you go:

[touzenesmy]

I have the same problem as you do norcalairman, but I'm using parttools 0.23 ans still have the problem :/