UISBUIRT does not transmit any IR codes

If I set USB UIRT action, in transmit IR command and I press the learn IR codes button the menu pops up, I press any key on the remote control, but it does not allow me to accept the burst, nothing happens.
I can learn IR codes, but if I try to transmit the learned codes the transmitter light turns on (does not burst) for a while, but I am certain nothing has been sent!
Going to UIS-UIRT configuration, and select the remote wakeup tab, I can learn, and a similar menu pops up, as above, and everything seems well. I copy the learned code into the main window for transmission and press the test transmit button, this results in the LED lighting up (no burst) and nothing else happens, again I think nothing has been transmitted!
Who has any clue, is the hardware broke?
I can learn IR codes, but if I try to transmit the learned codes the transmitter light turns on (does not burst) for a while, but I am certain nothing has been sent!
Going to UIS-UIRT configuration, and select the remote wakeup tab, I can learn, and a similar menu pops up, as above, and everything seems well. I copy the learned code into the main window for transmission and press the test transmit button, this results in the LED lighting up (no burst) and nothing else happens, again I think nothing has been transmitted!
Who has any clue, is the hardware broke?