[Dx4win] DX4Win/MMTTY help

[Lance]

I have been trying to set up DX4Win for RTTY and am having 
a problem!

I have MMTTY set up and running fine.  When I select the RTTY
window in DX4Win, I can receive RTTY just fine.  When I try to
transmit, I get the followning error:

     An exception occured!
     ie_Open - device already open

I have suspected it's a Com port problem, so have changed the
Preferences so that only one Com port is accessed.  I have four
available Com ports and MMTTY is using Com4.  Rig control is
Com1, packet cluster tnc is Com2.  Com3 is currently unused.

Can someone on the reflector give me some guidance?  
I would really like to keep using DX4Win for all modes.  I'm currently 
switching between MMTTY and manually entering all contacts in
DX4Win.

Thanks & 73,
   Lance WN0L