Content Provider not working on Nexus family devices

I'm developing an app with a ContentProvider to offer some inner files (binary files). When I deploy it on a Samsung Galaxy S, SII, or any other, it works perfectly, buy when I try it on a Galaxy Nexus or Nexus S, it doesn't work!

Scenario:

My ContentProvider can be accessed with two URIs. Depending on this URI, the provider creates a DataCursor (extending CrossProcessCursor) or ModelCursor (extending CrossProcessCursos also). The fact is that, in Nexus family, I access the first cursor (DataCursor) to retrieve an identifier, and it works perfectly, but when accessing the second one, it always throws "OutOfBoundsException" when trying

getBlob()

method.

Provider

@Override
    public Cursor query(Uri uri, String[] projection, String selection, String[] selectionArgs, String sortOrder) {
        Cursor cursor = null;

        // If the third app requieres DATA (phrase id, phrase string and phrase name)
        if(uri.toString().equalsIgnoreCase(ProviderConstants.DATA_URI.toString())) {
            // Build the DataHelper and the customized cursor
            DataHelper dataHelper = new DataHelper(getContext());
            cursor = new DataCursor(dataHelper);
        } else if(uri.toString().equalsIgnoreCase(ProviderConstants.MODEL_URI.toString())) {            
            // Let's take the model id from the selectionArgs...
            if (selectionArgs != null && selectionArgs.length > 0) {
                String modelId = selectionArgs[0];

                // Get an instance to the persistent storage service...
                File file = FileManager.getDirectory(getContext(), modelId);
                FileSystemPersistentStorageService clientPersistentStorageService = new FileSystemPersistentStorageService(file);

                cursor = new ModelCursor(clientPersistentStorageService);
            } else {
                Log.e("ContentProvider", "Query without model id on selectionArgs");
            }
        }

        return cursor;
    }

If you need some code or anything, just ask for it please!

Thanks a lot.