Modal Window Issue

Hello, 

I've got a frame shown into a modal window but this frame that is shown in a model window have inside a function that raises another frame with a modal window. And the result is not good. I sent the pictures and ask if there is any way to solve this 

Thank you very much.

  error_modal.png (Size: 25.41 KB / Downloads: 4)

  overlay_error.png (Size: 61.9 KB / Downloads: 3)