32-bit app on windows7-64 - using wrong system DLLs

Got a wierd one. On a client W7-64 machine, our app fails to start. Using 'depends', I can see that it is trying to use the 64-bit system DLLs in 'c:\windows\system32' rather than the 32-bit system DLLs in 'c:\windows\sysWOW64'. Is there a setting on the users machine that might cause this or anything I can change in my link to force it to pick up the correct 32-bit system libraries?

TIA

K

It might be worth looking at the 'Compatibility mode' in the Properties dialog for the executable. Right click on the exe in the Windows Explorer and select the Compatibility tab.

Please excuse a probably stupid follow-on question / observation from an engineer - not a computer scientist..

I recently tested some of my 32bit fortran/clearwin code on a W7-64 machine (Core I5) and all worked fine - I always put salflibc.dll in the program folder. I had on the memory stick in the same single folder both my programs and all the files Silverfrost needed to re-compile / link them. I did a re-compilation on the W7-64 machine and once again all was fine.

On examining the .EXE back on my W7-32 machine while file sizes were identical for all the .EXE's the content differed somewhat on a 'compare' - but they all still run fine on the W7-32 machine.

I assume this is as would be expected and that regardless of whether the compilation was on W7-32 or W7-64 the resultant code (if sound) should run on either system??

Thanks

Bill