Claude,
one think, the version for VFP 9 (I don'tknow for VFP8) in rotserver.prg and webappdebug.prg you refer to
#Include "c:\program files\microsoft visual foxpro 7\foxpro.h" or
#Include "c:\program files\microsoft visual foxpro 7\ffc\registry.h"

I think you should change them to

** in rotserver.prg
#if VERSION(5) = 700
    #Include "c:\program files\microsoft visual foxpro 7\Ffc\registry.h"
#endif

#if VERSION(5) = 800
    #Include "c:\program files\microsoft visual foxpro 8\Ffc\registry.h"
#endif

#if VERSION(5) = 900
    #Include "c:\program files\microsoft visual foxpro 9\Ffc\registry.h"
#endif

** in webappdebug.prg

#if VERSION(5) = 700
   #Include "c:\program files\microsoft visual foxpro 7\foxpro.h" or
#endif

#if VERSION(5) = 800
    #Include "c:\program files\microsoft visual foxpro 8\foxpro.h" or
#endif

#if VERSION(5) = 900
    #Include "c:\program files\microsoft visual foxpro 9\foxpro.h" or
#endif

I tryed to use HOME() but #include requires hard coded path :o((((