I assume you have the lcd working by now. How did you resolve the problem. I had the same problem.
I got it working by grounding the V0 pin.(display very dark though)
I have tried looking for an english data sheet but could only find the attached.
It seems to indicate the V0 pin(lcd power) needs to be a negative supply.
I dont intend using this display for future projects.
Tom
lcd datasheet.pdf (1.05 MB)