What's the connection like between your profilux and laptop? On mine, I have the GHL supplied RS232 cable plugged into the back of the profilux... connected to that I have an $8 futureshop RS232->USB adaptor cable.
WHen I plug into my laptop, my laptop recognizes the USB->serial adaptor and then I can connect via the profilux control program.
I don't know if it makes a difference or not but it might also be worth trying a new cable.
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