How to connect my PS2 wireless controller? ?

May be...

I plugged my cartridge (the thing to get a signal from) and the controller's light is blincing. and it dosen't work in the game. what's wrong and what should i do?

Make sure you have good batteries in the controller. There should be a sync button on the controller to tell it you want to sync to the cartridge. When the light is flashing that means it is searching for the controller and wanting you to push the reset button.

Read the instructions and it should all be there for your specific controller.