HELP Anyone Using a PS 300 w/ a BAT Preamp?

Just bought a PS 300 to use w/ my CD player and preamp. However, the PS 300 shuts down whenever the preamp turns on! The preamp is a BAT VK5 SE, whihc goes thru a 30 second "warm up period" before turning on. During the warm up (display blinking) the power draw is 19o watts as measure by the PS 300..however..whent eh warm up period nears completion, the voltage goes past 300..and the PS Audio shuts down. Anyone else experienced this problem w/ a PS 300???!!!!