Error Accessing the onboard SSRAM.

Hi,

how to overcome the warning while accessing the SSRAM..

This is the warning we are getting when we synthesize the code .

Warinig : Following 2 pins must use external clamping diodes

info: pin dq[0] uses IO standard 2.5 v at H3.

info: pin dq[1] uses IO standard 2.5 v at D1.

I am getting the constant high (1) output for these pin outputs, when I am simulating the code. Even I observed the outputs in Signal Tap II analyser .

But I already changed the device settings to choose these pins as user IO even then the same probelm continues..

Please suggest me waht I need to do to overcome the error ..

Hoping an early reply..

Thanks

Srinath.