FoxPro 2.6 DOS Run Error

I cannot run an external DOS program from inside Foxpro using the !/Run 
command.  I confirmed the comspec variable, I checked it using Foxpro's 
getenv() function, so that tells me that Foxpro knows it's there.  I 
confirmed there is enough RAM (35k), I added command.com into the c:\ 
directory.  I am running, in this case, MS-DOS 6.22 with the 4DOS 7.5 
command processor.  No Windows, no Linux, no DOSemu.

I get !/Run Command Failed.

Help?

Please note:  In this case, google is NOT my friend.

John