How do I can change the icon of my fleet?

Hello everyone. I just created my first clan to Navy Field 2 and would like to change the icon of my fleet, but not how. I have prepared a 32X32 icon in PNG format. and I have placed in the path; C: \ Program Files (x86) \ SD Enternet \ Navy Field 2 \ Register

Not if it is right or not, the fact is that there has been no change in the game. I would appreciate any help on this matter, thank you very much. Greetings to all.

Sorry for my English.