[Dx4win] APro exception

[OZ1AXG Flam]

Hi

Using Dx4Win 8.04 with Microham's USB II interface to my K3, i get this 
annoying "APro exception" (Win XP home)
Configuration is  COM4  : CW => CTS and PTT=>RTS

Normally its works - BUT if i enter "Preferences" in Dx4Win I get the APro 
Exception when hitting "save and exit". After this PTT stops working.
Only way to resolve this deadlock is to reboot the PC.

Any fix for this...?

Kind regards
OZ1AXG Flam