Rejean,

I assume you are trying to run the LXe software on your G5?

I suggest using the Control Panel to find out what serial port your
USB/Serial adapter is creating (e.g. COMM5, COMM6, etc). Next, when
you start LXe, there should be a menu that lets you specify which COMM
port.

Have you connected this LX7007 to a PC before, or is this your first
time? (Are you following the LX7007 manual's instructions for using
the TRANSFER | PC PORT menu?)

-ted