2.42" OLED display problem

Hi, I absolutely love this easy-to-use script! I have installed a new display since my old one was a little too small to read properly, but I am having trouble with this new display. It displays very dimly and there are lines across the screens. 

The driver is the same, the resolution is the same and I even reinstalled the script, but nothing seems to fix this.

Any help is much appreciated. 