IC-9700 does not send CW

Andy
 

I use V1.0.7620.0 experimental, W7Prof/64bits/8GB/2,76GHz
Trx connected to a PC only via USB.
TRX configuration :
USB SEND - USB(A) DTR
USB Keying (CW) - USB(A) RTS
USB Keying (RTTY) - OFF
Hardware configuration in the attachment.
Waterfall and cat works well.
When I try to send cq trx switches to tx, I get the error message "device attached to the computer does not work".
With the esc key, I switch  the trx to RX.
What I have wrongly set ?
Andrzej SP2FRY

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