Is there any issues when replacing a DSP card on an existing job with a newer one. Vertex sent me a much newer version of a DSP card other than what I had. The problem I am having is the inability for the unit to successfully complete a backup scan due to failure of the ETS system. I have replaced the NTS/ ETS optical switch on the car and everything seems to work fine if I am watching the I/O utility. The unit will sometimes fail in the up direction sometimes in the down direction. I have tried slowing the car down as well. Any ideas would be greatly appreciated.