problem in displaying surface current in CST

Hello everybody,

I am trying to display the charge distribution of a plasmonic metallic microstructure. I tried to visualize the surface current profile by setting "field monitor" and "H-field and surface current" option. The problem is that after the simulation, when I try to display the results for the 2D surface current, all the components disappear from the monitor and i cannot even see any current. Anyone can tell me what is the problem?

Thank you in advance,

Marta