Problem with using resource files for localisation

[PJRoyle]

We are writing apps to run on PDAs, which get shipped to different countries. When the users get them, they like to set the locale to their own language settings. So I have made the app localisable. If I deploy it from Visual Studio (2003) IDE, it works fine, but if I build CAB files and install from these, it doesn't seem to recognise locale changes and just sticks with the default (en-GB). As far as I can see, the files on the PDA are in the same places and everything looks the same in both cases.

Does anyone have a solution for this, please?
TIA,
Peter Royle