[1000mp] RTTY question

[N9NUN at aol.com]

I'm trying to setup my Mark V with Rigblaster Pro and Writelog and have an  
issue with keying the radio to transmit RTTY.  It seems when I have the  radio 
in USB it works fine but once I switch the radio over to the RTTY  mode it 
only transmits a carrier.  I'm sure I'm missing a setting  somewhere.  I have the 
rig talking to the computer on com port 4 (USB)and  the Rigblaster running on 
com 1. I tried using MMtty program along with the MixW  program and had the 
same results.  Any help on this would be  appreciated.  Just wondering if 
anyone else would happen to be running the  same setup that I could compare mine 
to.  

Thank you,
Mike