When i worked with u8glib on a Seeedstudio 96x96 OLED, i noticed that the chip is very sensitive to wire size and I2C speed. 100kHz is already the limit for this controller. I2C fast mode (400kHz?)was never working with my OLED.
Another reason for not beeing able to communicate with the controller could be the look state. A library should send an unlook sequence (0x0fd, 0x012) as first command.
Oliver