PPy typically forms on an electrode as a black powder-like substance, but if you are trying to use the SDS, I am not sure what color the film will be. It is possible that you formed a small passivating film on the electrode and that it is not very visible to the naked eye. What are you using for your electrochemical setup? 12 mA is a lot of current. I would take a step back and use a different electrolyte such as NaCl or something more simple.
Also, if all you are trying to do is polymerize the pyrrole, you could do it chemically by just adding some hydrogen peroxide to your pyrrole solution.