No Rabbit Processor Detected, BL2600, TU-S9 USB adapter used

Getting the dreaded No Rabbit Processor Detected message. Some time ago I was using the BL2600 with a serial board on a desktop PC but now am using a laptop with a Trendnet TU-S9 adapter. I have checked the port, #4, and have double-checked the cable connection, Ok, and have reset the BL2600.

Hello,If you are getting the no rabbit processor detected error, please go through steps mentioned at the
section 2.4 Starting Dynamic C at the below BL2600 user’s manual

Also check the below,
Sometimes under windows 7 pc the system cannot detect the processor because of the latency Timer value 16.
Please connect the Digi’s USB programming cable to the system, after detecting the COM port on the system ,then open the correct USB COM port’s “Advanced Settings” dialog box there is a “Latency Timer (msec)” selection drop-list, reduce the latency setting from the default of 16 msec to a much smaller value (1 or 2 or 3 msec) .

Now try to run the sample application on the module.

Thank you.