Thanks for your willingness to help....
I do have the cmd-wrapper in the same directory as the emulator (thought I had to after I looked at the configs - turns out I was right

I have attached my lconfig.ini as lconfig.txt (thought it was too big to copy and paste here).
Here's my atari780.cfg
extension=.a78
path=P:\Emulator\Atari780\Emulators\ProSystem
exe=cmd-launch7.exe
send rom path=0
send exit keys=1
command line options;--use-config-file=atari780.cfg
Here's my prosystem.ini just in case you needed/wanted to see that too...
[Recent]
Recent0=P:\Emulator\Atari780\Roms\Asteroid.a78
Recent1=P:\Emulator\Atari780\Roms\xevious.a78
Recent2=P:\Emulator\Atari780\Roms\Xenophob.a78
Recent3=P:\Emulator\Atari780\Roms\WINTERGA.A78
Recent4=P:\Emulator\Atari780\Roms\WATERSKI.A78
Recent5=P:\Emulator\Atari780\Roms\TOWERTOP.A78
Recent6=P:\Emulator\Atari780\Roms\titlemat.a78
Recent7=P:\Emulator\Atari780\Roms\TANKCMD.a78
Recent8=P:\Emulator\Atari780\Roms\suprhuey.a78
Recent9=P:\Emulator\Atari780\Roms\SUMMERGA.A78
[Display]
Fullscreen=true
Mode.Height=600
Mode.Width=800
Mode.BPP=8
Palette.Default=true
Palette.Filename=
Stretched=true
Zoom=1
[Sound]
Mute=false
Sample.Rate=44100
Latency=1
[Emulation]
Region=2
Frame.Skip=0
Bios.Filename=
Bios.Enabled=false
Database.Filename=P:\Emulator\Atari780\Emulators\ProSystem\ProSystem.dat
Database.Enabled=true
[Input]
Key0=205
Key1=203
Key2=208
Key3=200
Key4=45
Key5=44
Key6=38
Key7=36
Key8=37
Key9=23
Key10=50
Key11=49
Key12=60
Key13=61
Key14=62
Key15=63
Key16=64
[Console]
Save.Path=
Window.Left=0
Window.Top=0
Window.Right=800
Window.Bottom=600