[Dx4win] Rotor help Please

[WG0M at aol.com]

After working on the computer, I now have lost  rotor control.   Did a Merge 
in Preferences to restore settings.
 
In Rotor drop down I see Parameters and the very right box says  disabled.  
When I change it to either normal or offset and click okay, it  reverts back to 
disabled.  All cables are fine
 
In Preferences, control, I have the correct comm port and rotor  selected.  
The handshaking box states ThunderForm ARSWIN.
 
Something simple I am sure.  But need some help.  Thanks in  advance
 
Best  regards,

Michael WG0M