sad you have trouble.
Problem is ExoSpace.
It's a 16-Bit Extender specifically(!) altered
for Clipper.It can be instructed to use
EMS 4.0 and Extended Memory.
The Screen-Descriptor could also
make trouble in Win7.
This gives trouble in 32-Bit Protected Mode Windows.
I don't think that Windows7 is able to control
Exospace and it's own Extender.
The only way might be DosBox.
I really believe, that it not possible to use
Exospace Programs under Win7.
But why not use HARBOUR 3.2 ?
It is ready for Windows in 32 and 64-Bits(if you compile).
And has almost all functions of Clipper53.
Just those special graphics functions will be missing.
I would try it the Harbour way.