Gsr Swap Knock Sensor Question?

MY FRIEND DID A LS TO GSR SWAP IN HIS INTEGRA AND WE HOO KED UP THE VTEC PRESSURE SWITCH AND SOLINOID AND THE KNOCK SENSOR.----THE VTEC WORKS BUT ITS THROWING A KNOCK SENSOR LIGHT. WE HAVE REPLACED THE KNOCK SENSOR AND IT STILL APPEARS. WHAT COULD BE THE ISSUE.:(