How can I have a 3d plot for a complex (coupled) polynomial?

Dear all,

I’m trying to have a 3d plot for a complex polynomial using the ContourPlot3D
It shows me a plot which does not vary when the input values of different variables are varied.
So, I guess it is just a dummy plot I’m getting. Kindly guide me as how to get a correct 3d plot.
I’m using Mathematica version 9.

I want to plot y, xi and k along the three axes.
Sincerely.

complex_number020620.nb (262 KB)

Crossposted here.