I am rewriting a 2.6 windows application that has been working well for ~2 years. The first phase re-write is ready to go to QC so I built an executable for use by the test team. In both the development and .app environments the screens display properly but when the .exe is run some of the screens display a smaller width (should be 405 p looks like ~300) causing objects on the screen to be on top of each other. This is a problem.

Config.fpw sets these variables
_GENSCRN = 'C:\fpw26\GENSCRNX.PRG'
_SCXDRV5 = 'C:\fpw26\TABS.PRG'
_SCXDRV5 = 'C:\ppw26\INBROWSE.PRG'
_SCXDRV5 = 'C:\fpw26\3D.PRG'
_GENMENU = 'C:\fpw26\GENMENUX.PRG'

All of the screens use 3d.prg.
One of the screens that use neither tabs nor inbrowse display the problem while another does not. Neither of these screens save the environment.
None of the screens that use tabs.prg exhibit the behavior.
All of the screens that use only inbrowse exhibit the behavior.
Screens that use both tabs and inbrowse do not exhibit the behavior.

If foxpro 2.6 is running and I then run the executable the problem disappears.
If the exe is run on a win3.1 machine the problem disappears

I have tried:
building the exe on a windows 3.11 machine
setting the display to a standard svga driver
running the exe on four different machines

I need to resolve this problem asap so any suggestions, help will be greatly appreciated!
TIA
GAB