Potentiometer on the microdriver

I purchased two 532 nm green modules ( for laser pointers)

When I received I saw a little difference in beam intensity with my old 200 mw green module . The new one are not so powerful as the old one. I rotate a little bit the potentiometer on the microdriver and afterthat the diode did not lights up I tried hard to rotate left and right but nothig . I connected correctly to 16340 3,7 v battery . Why ? I broke the modules ? the diodes ? What could I do now ?

Thank you very much