Question: implicitplot(5-|2*x^2+2*y^2-13|)

I am using Maple 11.

I try to plot implcitly with filled regions such function:

(5-|2*x+2*y-13|)

When I use the plot assistant, I can get on a preview my implicit plot which is a ring. But, when I click plot, I get an error. 

So, Maple show the right preview and cannot get plot.

What is wrong? 

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