The Filter for the DC bias had been placed on connection 3 as it is for all other ESD drives but the person who installed it did not know ETMy is different the DC bias in on pin1.  This swap was done and the configuration is correct.  The next problem introduced was the lock up of the DAC channels.  I had to cycle the ESD off pull the DAC cable reinstall the DAC cable and power the ESD controller back up.  The system has been turned over for more testing.