I would appreciate advice on Turbochrom failing to seize a Perkin Elmer Series 200 Pump.

I have a Perkin Elmer series 200 pump, autosampler, and UV detector. The HPLC system is run by Totalchrom version 6.3.2 workstation. After I activate "Take Control" command, I get two errors:
"-993 Seize failed"
"-984 While taking control of the pump. ERROR 35 AT A: = Instrument does not
repond."

The LC system is connect to the workstation computer with a LINK box.
We have tried turning everything off, then back on; making sure to turn the LINK box on after the LC units.