[Plugin: Scissors Continued] watermarking does not work

i installed this plugin and have done everything that i knew should be done and still its not working for me, i even uploaded many types of images like gif, png, jpg, jpeg, JPG, but the watermarker scissors continued did not function at all and then tried it manually through editing the image and clicked watermarking and it did not work.

good luck and thank you for creating this plugin ??