z-transparency fresnel won't adjust

Hello,

I’ve been toggling with the “fresnel” and “blend” options under “transparency” for a few hours. Just recently every time I make an adjustment then render the “fresnel” turns back to .300 and then the “fresnel” and “blend” options dimmed. And now every time I toggle with it no changes happen in the preview window at the top of the texture box and in the render.

I don’t recall touching any button. Any thoughts?

Extra note: This is happening with all the adjustments. And it only happens with one object. The others are fine.