Little fresnel problem[Help]

Hi all!,
I've implemented Fresnel water in my app(like the fresnel demo comes with OgreSDK)
All seems to work right, but I've a problem:



How I can solve it?
Thanks.

Edit: Solved!, I've only elevated a little my planes:

mRefractionPlano->d = 25;
mAguaPlano->d = 0;
mReflectionPlano->d = 15;