[Elecraft] Data troubles

[Martin Sole]

Can anyone help with a quick DATA mode problem.

I've always used AFSK but it seems to have stopped working on transmit. 
I can set DATA A and then send audio from the PC into the radio. It 
transmits fine, no problem. Just switching to data mode AFSK and then 
sending audio. the vox operates as before but no modulation, no output.

In summary, RX works fine both modes
TX works fine in DATA A
TX does not work other than trigering VOX in AFSK A.

Nothing else changes other than the mode on the front panel. Line in, 
level all set the same.

Figure I must be doing something dumb.

Any help?

Thanks
Martin, HS0ZED