[WT-support] Microkeyer II DVK with WT not working

[W2LE]

Running WT 4.7 in Windows 7 with Microkeyer II and IC-7800.
I've been using Writelog with this configuration and the DVK works, I'd 
like to go to Win-Test.

Under options-configure interfaces I've set enable soundcard and 
selected headset earphone (Microham co) (that's all that's readable and 
the only choice that references microham).

When I press F4 or F2 I only get a message "Message at 100% not 
available" and nothing plays.

What am I missing?

Paul  W2LE