Strange problem with I2C Pins.

Hello all,

working over a project which needs I2C protocols, m not using default I2C registers,

very first i used P3.0, P3.1 for SDA and SCL, with resisters of 4.7k pull-up to 3.3v, don't know how these pins got damage.
so i changed it SDA and SCL to P3.2, P3.3 respectively with 2.7K pull-ups, its working fine but today after few days again my SDA pin got damage, controller is working fine other pins but these damage pins are useless even cant be used as GPIO now.

m very much confuse code is working fine but why this PINs SCL n SDA getting damage.
Doing I2C in Between MSP430F5325 and PCM9211. 

Kindly Revert if u catches my problem, why these pins getting damage....?

thanks and Regards

Sonu Verma