PCGU1000 no response on a Toshiba laptop

Hello,
I have read the problems people had with the PCGU1000 and tried the solutions described. It continues not working. My laptop is a Toshiba with Windows XP.
The power adapter supplies 9V
When I start the Pc_Lab2000se program, it says it has detected USB device and I have disabled LPT Plug-and-play. When I click OK, after saying LOADING … an Information window appears
No function generator response
Check the power adapter connection and restart this program
and the led stays off.
In the devices administrator, PCGU1000 COM Port is COM9
I have also tried COM8 and COM2
In the USB controllers I have the PCGU1000 Function Generator
What else can I do?

I think you can’t do anything more.
Sorry, but it seems that your PCGU1000 is defective.
You have to return it to the local dealer.

Have you ever tried to switch your COM-Port to COM1…COM4.
Other Ports don’t work !!