i2c problem on LPC2148
Check you pull up resistor value. It is really 3k6 or 3R6 by mistake.
Is the Pin of your MCU configured properly ( alternate function, no internal pull-ups enabled ?)
Is there a short to Vcc somewhere on the board ?
Are the MCU pin 5V complient ?
Are you using internal i2c module of the mcu? because open drain pins are necessary here.