[Elecraft] K3 - JT65

[Gene]

I used JT - 65 successfully on my lap top running XP.  However, I am 
having difficulty setting things up on a new computer running Windows 7.

Signals are being decoded without any problems but I can not transmit a 
signal.  My settings are:

Mode: Tx data A,  Pwr: 10 -20 W,  Mic line out level: 20 ( I have tried 
lower and higher values)  Mic Sel (Main menu) Line In.

Previously on the lap top I would increase the sound output from the 
computer until the ALC would kick in at approx 4 to 5 bars.  No matter 
how low or high the sound output is now no ALC is present.  I can hear 
sounds like I am transmitting but there is no ALC or power out.

What am I missing?  Any Suggestions?

Thanks,

Gene

W2BXR