Tony,

Does your PC have a native RS232 serial port or are you using a USB to Serial adaptor?

If you are using a USB to Serial adaptor then you are best using the 'Keyspan' this model is well proven for use with M. equipment.

www.keyspan.com/products/USB/usa19hs/homepage.spml

You need to cycle the power switch on the rear panel.

Cheers

Meridian 800 DVD V4, DSP7200.2's