Using a FT-817 I try to transmit with WSPR but there is no audio out from the PC. I'm using the same parameters as when I'm working in BPSK (that works well). Clicking on 'Tune' makes the TX 'ON AIR' but without an AF-Signal no RF will come out.

Can somebody help me?

(Sorry for the mistakes, but it is a long time ago that I learn English in school).

Thanks in advance,
Bernd