To inilalize this display wyou need to write something like this
Code:
high RESET
pause 10
low RESET
pause 10
high RESET

I2CWRITE datapin, clockpin,$7C[$80,$57,$80,$6C,$80,$01,$80,$02]
before you can write to the display
Code:
I2CWRITE datapin, clockpin,$7C[$80,$80,$40,$48,$45,$$4C,$4c,$4F]  'HELLO
I do not have a display to test so not sure if this will work, but this is what I would start with, I took the code from the data sheet.

Dave